Created by KarenSTL on September 22, 2018
Step 1: Preheat oven to 350 degrees. Grease and flour (or use cooking spray) a 9 x 13 pan.
Step 2: Cream together butter and sugar with a mix master or electric hand mixer.
Step 3: Add egg yolks one at a time and beating well before adding another egg yolk.
Step 4: Mix flour, baking powder and graham cracker crumbs into a bowl. Add some dry mixture to the butter mixture, mixing until incorporated. Then add some milk, mix until incorporated. Repeat, alternating dry vs wet until all are mixed in.
Step 5: Add vanilla and nuts, mixing quickly.
Step 6: Stiffly beat egg whites in a separate bowl. Fold in egg whites into batter.
Step 7: Pour batter into the 9x13 pan and bake for 30 minutes. The cake is finished when the edges pull away from the pan and the middle bounces back when touched slightly. Or use a cake tester or toothpick, and when it comes out clean in the middle, it is done.
Step 8: Cool and then frost with chocolate icing.