01 -
Set the oven to 350°F and line three 8-inch pans.
02 -
Put your dry ingredients into a stand mixer and blend.
03 -
Add the butter and mix until it looks crumbly.
04 -
Slowly pour in egg whites and buttermilk while mixing.
05 -
Add in oil and vanilla extract, give it a good stir.
06 -
Run the mixer at medium speed for a minute.
07 -
Pour batter evenly across the pans.
08 -
Bake for 33 to 35 minutes, until done.
09 -
Let cool 10 minutes, then freeze for 30 minutes.
10 -
Whip the butter until fluffy.
11 -
Mix in vanilla and salt.
12 -
Add powdered sugar little by little with heavy cream.
13 -
Keep mixing until smooth and creamy.
14 -
Slice off any uneven tops from the cake layers.
15 -
Stack cake layers, spreading buttercream between each.
16 -
Apply a light base coat of frosting and chill the cake.
17 -
Frost the cake completely and make it look amazing!