Ingredients:
- 250g cake flour
- 300g granulated sugar
- 10g baking powder
- 3g fine sea salt
- 115g unsalted butter, softened
- 120g egg whites, room temperature
- 120g full-fat sour cream
- 120ml whole milk
- 5ml almond extract
- 5ml pure vanilla extract
- 120g confectioners' sugar
- 30ml heavy cream
- 1.25ml almond extract (for glaze)
- 30g slivered almonds, toasted
Instructions:
- Preheat oven to 350°F (175°C). Line a 9x9 inch square baking pan with parchment paper, leaving an overhang on two sides.
- Sift the cake flour, granulated sugar, baking powder, and salt into the bowl of a stand mixer.
- Using the paddle attachment, mix the softened butter into the dry ingredients on low speed until the texture resembles coarse sand.
- In a separate bowl, whisk together the egg whites, sour cream, milk, 5ml almond extract, and vanilla extract until smooth.
- Gently fold the wet ingredients into the flour-butter mixture in three stages using a rubber spatula to maintain aeration.
- Pour the batter into the prepared pan and bake for 30 minutes, or until a toothpick inserted into the center comes out clean.
- Whisk together confectioners' sugar, heavy cream, and 1.25ml almond extract to create the glaze. Pour over the cooled cake and garnish with toasted slivered almonds.