Method
1. Prepare the oven and pan
Preheat the oven to 350°F. Grease and flour a 9 x 13-inch cake pan.
2. Combine the dry ingredients
In a medium bowl, whisk together the cake flour, baking powder, baking soda, and salt.
3. Cream the butter and sugar
In a large bowl, using a stand mixer fitted with the paddle attachment or a hand mixer, beat the butter and sugar on medium speed until light and fluffy, 3 to 4 minutes.
4. Add the extracts and egg whites
Beat in the vanilla and almond extracts. Add the egg whites one at a time, beating well after each addition and scraping down the bowl as needed.
5. Combine the sour cream and cherry juice
In a small bowl or measuring cup, stir together the sour cream and cherry juice until smooth.
6. Finish the batter
With the mixer on low speed, add the flour mixture to the butter mixture in 3 additions, alternating with the sour cream mixture in 2 additions, beginning and ending with the flour mixture. Mix just until combined after each addition. Fold in the chopped maraschino cherries.
7. Fill the pan
Spread the batter evenly in the prepared pan and smooth the top.
8. Bake
Bake for 28 to 35 minutes, or until the cake springs back lightly when touched in the center and a tester inserted in the middle comes out clean.
9. Cool
Transfer the pan to a wire rack and let the cake cool completely.
10. Frost the cake
Once completely cool, frost with Cherry Buttercream Frosting.