1 box yellow cake mix
1 c. milk
3 tbsp. cornstarch
1 c. sugar, powdered or granulated
1 stick butter
1/2 c. Crisco

Prepare cake mix as directed on package in 2 round or a 9 x 13 inch cake pan. Let cool. Slice cake into desired pieces and slice through the middle. Cook milk and cornstarch until thick; cool. Beat sugar, butter, and Crisco until fluffy; add to cornstarch mixture and continue beating until very fluffy. Spread between slices of cake.