Step 1

Use the handle of a wooden spoon, skewer, or chopstick to poke holes over the entire surface of the cooled cake.

Step 2

Prepare Jell-o with 1 cup boiling water and 1/2 cup cold water. (This is 1/2 cup less water than the directions on the box.)

Step 3

Pour Jell-o over the cake - making sure to get some in every hole and over the surface of the cake.

Step 4

Refrigerate overnight or at least three hours.

Step 5

Whisk together milk and lemon pudding mix.

Step 6

Let sit for about one minute, then fold in whipped topping until incorporated.

Step 7

Spread topping over cake and refrigerate until serving.

Step 8

Add sprinkles and lemon slices for garnish just before serving.