Brown Butter Bourbon Pineapple Upside Down Cake (Cast Iron)
A love letter to my Mom — with a more grown-up twist
The Cake My Mom Loved (and the One I Wish I Could Have Told Her About)
There’s a photo somewhere of my mom standing over a pineapple upside down cake, wooden spoon in hand, looking like she’d just pulled off something spectacular; and she had. The thing was gorgeous — golden rings, jewel-bright cherries, the whole retro spectacle. She made it for birthdays, for company, sometimes just for a Tuesday.
She always assumed I loved it as much as she did; and I did love it — I loved that she made it, loved the ritual of it, loved the way she lit up when she flipped the pan and that sticky caramel top revealed itself. But if I’m being honest, I always found it a little too sweet for my taste. The syrup-soaked pineapple, the dense sugar hit of the topping — it was a lot. I’d eat a slice (or two, because it’s Mom’s cake) and quietly wish for something a little more balanced.
She’s gone now, and I still think about that cake. Not because I miss the sweetness, but because I miss her. So I’ve spent some time working on a version that would make her proud — one that keeps all the nostalgia, the sticky caramel top, the cast iron skillet on the stovetop — but upgrades it into something I’d genuinely crave. Something I’d make on a Tuesday just for my wife and I.
The secret? Brown butter in the batter, and a splash of bourbon in the caramel. Two small changes that completely transform the flavor profile. The brown butter adds a toasty, nutty depth that makes the cake taste rich without being too sweet. The bourbon brings a subtle bitterness and warmth to the caramel that puts the brakes on the sweetness, giving the whole thing a complexity that feels more sophisticated — more grown-up. And a finishing pinch of flaky sea salt scattered over the warm caramel after the flip delivers that salted caramel effect — little crystals that sit on the surface and give you distinct pops of salinity in every bite, pulling the whole thing into a perfect balance.
Mom, if you’re reading this from wherever baked goods are made in heaven, I’m not saying yours wasn’t perfect, I’m saying I finally figured out my version. I think you’d love it too.
Why This Recipe Works (The “Why” Behind Every Technique)
Because I know you like to understand what’s happening in the kitchen, not just follow instructions blindly — here’s what each key choice does:
Brown Butter in the Batter
Melting butter past the foam stage causes the milk solids to caramelize, creating new flavor compounds (the same Maillard reaction that browns a steak). The result is a nutty, almost toffee-like depth that vanilla extract alone can’t give you. It costs you about 5 extra minutes and transforms an ordinary yellow cake batter into something that tastes like it came from a bakery.
Bourbon in the Caramel
Bourbon carries tannins and barrel-char bitterness that act as a natural counterweight to sugar. When you add it to the hot caramel, most of the alcohol burns off but the complex flavor compounds stay behind. The result isn’t boozy — it just tastes deeper and more interesting. Think of it as the difference between plain caramel and salted caramel: one small addition that makes the whole thing more nuanced.
Sour Cream in the Batter
Most pineapple upside down cake recipes use butter + milk. Swapping some of that for sour cream does two things: the fat content creates an incredibly tender crumb, and the gentle acidity provides a slight tang that balances the sweetness of the topping. It’s the same reason a good cheesecake or coffee cake recipe almost always calls for sour cream.
Dark Brown Sugar vs. Light
Dark brown sugar has twice the molasses content of light brown sugar, which means more complexity, more depth, and a slightly bitter edge that works in your favor when you’re trying to temper sweetness. Using it in both the caramel and the batter creates a consistent flavor thread through the whole cake.
Fresh Pineapple (If You Can Swing It)
Canned pineapple in syrup is sweetened before it even hits your caramel. Fresh pineapple is naturally tart and fragrant — the flavor is brighter and more tropical, and it doesn’t add an extra layer of sugar you didn’t ask for. If you do use canned, go juice-packed and dry it obsessively with paper towels.
Tips, Variations & Make-Ahead Notes
The Most Important Tips
- Dry the pineapple obsessively. Any excess moisture in the pan will steam instead of caramelize, and your caramel will be watery rather than glossy. Paper towels, multiple rounds, do not skip this.
- Cool for exactly 10 minutes before flipping — use a timer. Cast iron holds heat; too soon and the cake is fragile, too long and the caramel sets like glue.
- Be decisive on the flip. Hesitation causes uneven weight distribution and spills. One confident motion, plate already firmly on top.
- Add the flaky salt within 2 minutes of flipping, while the caramel surface is still warm and slightly tacky. If the caramel cools and sets first, the flakes won’t adhere. Less is more here — you want little pops of salinity, not a salt crust.
Variations Worth Trying
- Add a tiny pinch of cayenne (1/8 tsp) to the caramel. You won’t taste heat — you’ll just taste a depth you can’t quite explain. It elevates the bourbon note beautifully.
- Swap the bourbon for dark rum for a slightly sweeter, more tropical variation.
- Use crushed pineapple in the mini skillet (well-drained) for better fruit coverage in every bite.
Make-Ahead
- Brown the butter up to 3 days ahead. Refrigerate and bring back to room temperature (liquid) before using.
- The cake itself can be made 4–6 hours ahead and served at room temperature. Don’t refrigerate it before serving — cold dulls the caramel flavor.
Brown Butter Bourbon Pineapple Upside Down Cake
Equipment
- 1 10–12" cast iron skillet
- 1 light-colored saucepan
- 1 large mixing bowl
- 1 rubber spatula
- 1 large serving plate or cutting board
Ingredients
For the Bourbon Caramel Topping:
- 4 tablespoons unsalted butter
- 1/2 cup dark brown sugar packed
- 2 tablespoons bourbon
- 1/4 teaspoon kosher salt
- 7 pineapple rings fresh or canned in juice, patted dry
- 7 maraschino cherries optional, for the classic look
- Flaky sea salt such as Maldon, for finishing — a light pinch
For the Brown Butter Cake Batter:
- 8 tablespoons butter
- 3/4 cup granulated sugar
- 1/4 cup dark brown sugar packed
- 2 large eggs
- 3 teaspoons vanilla extract
- 1/2 cup sour cream
- 1/4 cup whole milk
- 1-1/2 cups all-purpose flour
- 1-1/2 teaspoons baking powder
- 1/4 teaspoon baking soda
- 1/2 teaspoon kosher salt
Instructions
- Preheat your oven to 350°F.
- Brown the butter: In a light-colored saucepan, melt 8 tablespoons of butter over medium heat, swirling frequently. Once it foams and the foam subsides, watch for golden-brown bits forming on the bottom and a nutty, toasty aroma — about 5 –7 minutes. Pour immediately into a bowl and let cool for 15 minutes. Do not skip the cooling step; hot brown butter will scramble your eggs.
- Make the bourbon caramel: Set your 10–12″ cast iron skillet over medium-low heat. Melt 4 tablespoons of butter completely, then add the dark brown sugar and kosher salt. Stir until the sugar dissolves and the mixture bubbles gently, about 2–3 minutes. Pull the pan off the heat and carefully add the bourbon — it will sputter and sizzle. Stir to combine and tilt the pan to spread the caramel evenly across the bottom.
- Arrange the pineapple: Pat the pineapple rings completely dry (excess moisture is the enemy of a clean flip). Arrange them over the caramel — one in the center, six around the edge. Tuck a cherry into each ring center if using. Set the skillet aside, off heat.
- Mix the wet ingredients: In a large bowl, whisk together the cooled brown butter, granulated sugar, and dark brown sugar until combined. Add the eggs one at a time, whisking well after each. Stir in the vanilla extract, then the sour cream and milk. The batter should look smooth and glossy.
- Add the dry ingredients: Sift the flour, baking powder, baking soda, and salt directly into the bowl. Fold with a rubber spatula until just combined — stop the moment you can’t see any dry streaks. A few lumps are completely fine. Overmixing develops gluten and makes a tough cake.
- Fill and bake: Pour the batter over the pineapple in the skillet, spreading gently to the edges without disturbing the fruit. Transfer to the oven and bake for 35–42 minutes, until the top is deep golden brown and a toothpick inserted in the center comes out clean.
- The flip: Let the cake cool in the skillet for exactly 10 minutes — set a timer. No longer, or the caramel will begin to harden and stick to the pan. Run a thin knife around the edge. Place a large serving plate or cutting board firmly on top of the skillet, then flip in one confident, decisive motion. Leave the skillet resting on the cake for a full 60 seconds before lifting straight up — gravity does the work of releasing the caramel. While the caramel surface is still warm and tacky (within the first 2 minutes), scatter a light pinch of flaky sea salt across the top. The flakes will adhere just enough to stay put and deliver little pops of salinity in every bite.
- Serve warm or at room temperature. A scoop of vanilla ice cream or a dollop of unsweetened whipped cream is the ideal accompaniment — the contrast of cold and the neutral fat helps cut through the caramel richness beautifully.
Notes
| Nutrient | Amount |
| Calories | ~385 kcal |
| Total Fat | 18g |
| Saturated Fat | 11g |
| Cholesterol | 90mg |
| Sodium | 210mg |
| Total Carbohydrates | 52g |
| Sugars | 34g |
| Protein | 4g |
Mini Pineapple Upside Down Cake for Two Recipe:
Mini Brown Butter Bourbon Pineapple Upside Down Cake for Two
Equipment
- 1 6" cast iron skillet
- 1 small saucepan
- 1 mixing bowl
- 1 rubber spatula
- 1 salad plate
Ingredients
For the Bourbon Caramel Topping:
- 1-1/2 tablespoons unsalted butter
- 3 tablespoons dark brown sugar packed
- 1 teaspoon bourbon
- 1/8 teaspoon kosher salt
- 2-1/2 pineapple rings fresh or canned in juice, patted dry
- 1 maraschino cherry optional, for the classic look
- Flaky sea salt such as Maldon, for finishing — a very small pinch
For the Brown Butter Cake Batter:
- 3 tablespoons unsalted butter
- 1/4 cup granulated sugar
- 2 tablespoons dark brown sugar packed
- 1 large egg
- 1 teaspoon vanilla extract
- 3 tablespoons sour cream
- 1-1/2 tablespoons whole milk
- 1/2 cup all-purpose flour
- 1/2 teaspoon baking powder
- 1/8 teaspoon baking soda
- 1/8 teaspoon kosher salt
Instructions
- Preheat oven to 350°F.
- Brown the butter: Melt 3 tablespoons butter in a small saucepan over medium heat, swirling often. Pull off the heat when you see golden brown bits at the bottom and smell the nuttiness — about 4–5 minutes. Cool for 15 minutes.
- Make the bourbon caramel: Set the mini cast iron over medium-low heat. Melt the 1-1/2 tablespoons butter, stir in brown sugar and salt, and cook for about 2 minutes until bubbly. Take off the heat, add the bourbon (it will sizzle — that's the good stuff), stir, and tilt to coat the bottom evenly.
- Arrange pineapple: Pat rings dry. A 6" skillet fits about 1 full ring in the center with pieces of a second and third ring filling the gaps. Arrange the fruit to cover as much caramel as possible. Add cherries if using.
- Mix the batter: Whisk cooled brown butter with both sugars. Add the egg and whisk well, then stir in vanilla, sour cream, and milk. Sift in the flour, baking powder, baking soda, and salt and fold until just combined.
- Fill and bake: Spoon batter evenly over the pineapple. Bake for 24–30 minutes, until golden and a toothpick comes out clean. The edges will slightly pull away from the pan.
- Cool for 10 minutes, then flip onto a salad plate. Let the skillet rest on the cake for 60 seconds before lifting. While the caramel is still warm and tacky, scatter a very small pinch of flaky sea salt across the top. Serve immediately.
Notes
| Nutrient | Amount |
| Calories | ~370 kcal |
| Total Fat | 17g |
| Saturated Fat | 10g |
| Cholesterol | 115mg |
| Sodium | 230mg |
| Total Carbohydrates | 50g |
| Sugars | 33g |
| Protein | 5g |
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We made the mini version for two. Love this recipe with the bourbon and brown butter. Great with a scoop of vanilla ice cream. Will definitely make this again!