01 -
Preheat oven to 175°C. Grease a tall 20 cm springform or cake pan and line with parchment, allowing extra overhang for easy removal.
02 -
In a large mixing bowl, beat softened butter and granulated sugar until pale and fluffy. Incorporate eggs, vanilla extract, almond extract, and sour cream until well combined. Add flour, baking powder, and salt. Beat until a thick, smooth batter forms.
03 -
Evenly spread batter into prepared pan. Bake for 15–18 minutes, until cake is puffed and lightly golden.
04 -
While cake bakes, whisk egg whites until foamy. Add cream of tartar, then continue beating until stiff peaks form. Gradually add sugar, then beat in salt and almond extract. The meringue should be glossy with medium-soft peaks.
05 -
Remove cake briefly from oven. Evenly spread meringue on top. Scatter sliced almonds over meringue.
06 -
Return pan to oven and bake for an additional 30 minutes, until the meringue is puffy and lightly toasted.
07 -
Allow cake to cool completely in the pan. Remove and transfer to a serving plate. Dust generously with powdered sugar through a fine mesh sifter before serving.