1 C room temp butter
2 tsp Vanilla
3 C Sugar
1/3 C Sour Cream
6 Lg Egg Whties (about a cup)
3 2/3 C All purpose Flour
1 ¾ tsp Baking Powder
½ tsp Salt
*Pre-heat oven to 325
**Grease a pan with cake release
Step 1: Cream together butter, vanilla, sugar and sour cream until smooth.
Step 2: Slowly mix in the egg whites (about 1/3 at a time)- keep the mixer on low for about 5 minutes as you mix in the egg whites. After 5 minutes, turn the mixer on medium for an additional 3 minutes- This step is CRUCIAL. Don’t under-beat or the cake might crumble after cooking.
Step 3: Mix together the remaining dry ingredients.
Step 4: Mix the dry ingredients into the wet ingredients about 1 C at a time until entire mixture has combined. Continue to mix for an additional 2 minutes until smooth.
Step 5: Bake at 325 F for approximately 25-30 minutes in a 10” round pan or 9x9 square pan.