How to Add Milk Mixture Without a Mess
Pour milk mixture into clean plastic bottle with squirt tip. Insert tip of bottle into holes in cake before squeezing milk mixture into holes.
Add the zest of 1 lemon to cake batter for extra citrus flavor before baking. Garnish cake with lemon slices.
Prepare cake batter and bake in 13x9-inch pan. Cool completely. Pierce cake and pour milk mixture over cake in pan. Refrigerate 1 hour. Frost as directed.