this makes a large sheet cake
6 cups sugar
3 cups butter
10-1/2 cups cake flour
3 cups milk
18 egg yolks
4-1/2 teaspoon double acting
baking powder
6 teaspoon vanilla extract
1/2 teaspoon Salt
Preheat oven to 350 degrees. Grease and flour large sheet pan.(18 x 24) Beat butter and sugar at high speed until smooth and fluffy. Add flour and rest of ingredients; at low speed beat until well mixed. Then beat at high speed for 4 minutes occasionally scraping bowl. Pour batter in large bakery sized sheet pan or 4 -9 x 13 pans. Bake for 1 to 1-1/2 hours, depending on the type of oven. Cake is done when toothpick inserted in center comes out clean. Cool cake for 10 minutes then remove from pan.
Serves 40 to 50 people.