Step 1

Pre-heat oven to 350 degrees F.  Grease two 8 inch cake pans and set aside.

Step 2

In a medium sized bowl add the flour, salt and baking powder and mix until combined.

Step 3

In a large bowl beat together the butter and sugar for 4-5 minutes with an electric mixer, this way it will become light and fluffy.  Next, add the vanilla extract and milk and mix again with your electric mixer.  It will look a little curdled but that is ok!

Step 4

Next, add in half of the flour mixture and mix until combined, followed by half of the yogurt and mix again.  Repeat with the remaining flour mixture and yogurt.

Step 5

Add the egg whites to a large bowl and beat until stiff peaks have formed, 3-4 minutes.  Gently fold the egg whites into the cake batter until completely combined.

Step 6

Pour equal amounts of cake batter into each cake pan and bake until sides are starting to brown and an inserted toothpick comes out clean, 30-35 minutes.  Let cakes cool in the cake pans for about 5-10 minutes and then transfer to a wire rack and cool the rest of the way.

Step 7

Once cakes are completely cooled you can frost them!