This light and fluffy upside down mimosa orange cake is bright, citrusy, and soaked with just the right touch of champagne. It’s basically brunch in cake form and the kind of sunny, effortless showstopper that feels made for sharing at a summer gathering.

a cake on a cake stand

Table of Contents

Everything you need to make this recipe

  • butter + sugar + oranges: This is where the upside down magic happens. The butter and sugar bake into a glossy, caramel like layer that hugs each slice of orange and creates the prettiest topping once the cake is flipped.
  • flour + baking powder + salt: The simple but essential foundation of the cake. The flour gives it structure, the baking powder helps create that soft and fluffy crumb, and the salt balances out all the sweetness.
  • butter + sugar + egg whites + vanilla + orange zest + champagne: The ingredients that bring the cake to life. Egg whites keep it light and airy, orange zest adds that fresh citrus flavor, and champagne brings a subtle bubbly sweetness that makes every bite feel like a celebration.

Kitchen equipment needed:

  • cutting board + chef’s knife
  • mixing bowl + whisk
  • stand mixer
  • 9″ round cake pan
a cake on a cake stand

How to make this orange cake

This upside down mimosa orange cake looks impressive, but it comes together with a few simple steps. The hardest part is waiting for the big flip to reveal those glossy, caramelized oranges on top.

1. Prep the cake pan

Grease and line a 9 inch cake pan, then layer the melted butter, sugar, and orange slices on the bottom.

2. Mix the dry ingredients

Whisk together the flour, baking powder, and salt until combined.

3. Beat the butter and sugar

Beat the butter and sugar together until light, fluffy, and pale in color.

4. Add the remaining wet ingredients

Mix in the egg whites one at a time, then add the vanilla and orange zest.

5. Add the dry ingredients and champagne

Alternate adding the flour mixture and champagne until the batter just comes together.

6. Bake the cake

Spread the batter over the oranges and bake until golden and a toothpick comes out mostly clean.

7. Cool the cake

Let the cake cool slightly, carefully invert onto a plate, then slice and enjoy.

orange slices in a cake pan

Servings and pairings

This upside down mimosa orange cake is bright, citrusy, and just the right amount of sweet. It feels special enough for a celebration but simple enough for a slow weekend morning when you want something a little extra.

  • Weekend brunch – This cake was basically made for a brunch table. Serve it alongside fresh fruit, coffee, and a round of mimosas for the ultimate sunny spread.
  • Summer gatherings – The glossy orange topping makes this cake a natural centerpiece. It’s easy to make ahead, beautiful to serve, and the kind of dessert everyone wants a slice of.

Drink pairings:

  • Wine: Prosecco or champagne — The bubbles complement the citrus notes in the cake and keep each bite feeling light and fresh.
  • Coffee: Vanilla latte — A cozy, creamy pairing that balances the bright orange flavor beautifully.
  • CocktailClassic mimosa — When the cake is inspired by the drink, you might as well fully commit.
  • NA optionSparkling orange water — All the refreshing citrus and bubbles without the booze.
a cake on a cake stand

Storage recommendations

Room temperature: Store leftover cake in an airtight container at room temperature for up to 2 days. The oranges will continue to soak into the cake, making each slice extra moist and flavorful.

Refrigerator: For longer storage, keep the cake covered in the refrigerator for up to 5 days. Let slices sit at room temperature before serving to bring back that soft, fluffy texture.

Want more baking recipes?

If pasta is your love language, you’re in the right place. Here are a few more recipes I reach for when I want something comforting, satisfying, and guaranteed to leave me scraping the bottom of the bowl.

a cake on a cake stand

Questions? Comments? Reviews? Leave them below. This is the best way to reach me, and yes, I actually read them.

Xoxo, Lee

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a cake on a cake stand

Upside Down Mimosa Orange Cake


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  • Author: Lee Buchin
  • Total Time: 1 hour
  • Yield: 8 slices 1x

Description

This light and fluffy upside down mimosa orange cake is bright, citrusy, and soaked with just the right touch of champagne. It’s basically brunch in cake form and the kind of sunny, effortless showstopper that feels made for sharing at a summer gathering.


Ingredients

Units Scale

Orange Topping

  • 4 tbsp unsalted butter, melted
  • 1/2 cup granulated sugar
  • 34 oranges, thinly sliced, leave peel on or remove as preferred (zest 1 orange before slicing)

Cake

  • 1 and 1/2 cups all-purpose flour
  • 1 and 1/2 tsp baking powder
  • 1/2 tsp kosher salt
  • 1/2 cup (1 stick) unsalted butter, room temperature
  • 1 cup granulated sugar
  • 3 large egg whites
  • 1 tsp vanilla extract
  • 1 tbsp orange zest
  • 2/3 cup dry champagne

Instructions

  1. Prep the cake pan: Preheat oven to 350°F. Grease a 9 inch round cake pan and line the bottom with parchment paper. Pour the melted butter into the pan and gently swirl until the bottom is evenly coated. Sprinkle the sugar over the butter, then arrange the orange slices on top in an overlapping circular pattern until the entire surface is covered. Set aside while you prepare the batter.
  2. Mix the dry ingredients: In a medium bowl, whisk together the flour, baking powder, and salt until combined. Set aside.
  3. Beat the butter and sugar: Using a stand mixer fitted with the paddle attachment, beat the butter until smooth and creamy. Add the sugar and continue mixing until the mixture is light, fluffy, and pale in color.
  4. Add the remaining wet ingredients: Add the egg whites one at a time, mixing well after each addition. Add the vanilla and orange zest and mix until fragrant and fully combined.
  5. Add the dry ingredients and champagne: Gradually add the flour mixture and champagne, alternating between the two. Start and finish with the dry ingredients and mix just until everything comes together.
  6. Bake the cake: Pour the batter over the orange slices and gently spread it into an even layer. Bake for 35 to 40 minutes, or until the top is set and a toothpick inserted into the center comes out mostly clean.
  7. Cool the cake: Let the cake cool in the pan for 10 minutes. Place a serving plate over the top of the pan, carefully flip the cake over, and lift away the pan. Remove the parchment paper and let the cake finish cooling at room temperature for at least 1 hour. Slice and enjoy!
  • Prep Time: 25 minutes
  • Cook Time: 35 minutes
  • Category: Dessert
  • Method: Oven

Nutrition

  • Calories: 437
  • Sugar: 44g
  • Sodium: 206mg
  • Fat: 18g
  • Saturated Fat: 11g
  • Trans Fat: 0g
  • Carbohydrates: 64g
  • Fiber: 2g
  • Protein: 4g
  • Cholesterol: 46mg

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