Boston Creme Pie is not really a pie. It’s a cake! But we’re not going to argue with whomever invented this cake.
18.25 ounce boxes of cake mix have been replaced by 16.5 ounce and 15.25 ounce boxes. To compensate for the volume loss in a 16 ounce box, whisk 6 tablespoons all-purpose flour into the dry cake mix before proceeding with the recipe. To compensate for the volume loss in a 15.25 ounce box, add 1/2 cup + 3 tablespoons all-purpose flour and 1/4 teaspoon baking powder.
This cake must be kept refrigerated.
Find it online: https://simplygreatrecipes.com/boston-creme-pie/