Step 1

Preheat oven to 350 degrees.

Step 2

Cover 2 -15 x 10 jelly roll pans with parchment papers.

Step 3

In a mixing bowl, beat together cake mix, eggs, pudding mix and milk. Beat until smooth and combined.

Step 4

Evenly distribute cake batter between the two jelly roll pans. Spread evenly.

Step 5

Bake both 12-15 minutes or until toothpick inserted comes out clean.

Step 6

Let cake cool completely.

Step 7

In a mixing bowl, beat butter until fluffy. Add in powdered sugar, flour and vanilla. Add in milk and beat until fluffy.

Step 8

Spread filling on just one of the cooled cakes. Take the second cake and place on top.

Step 9

Sprinkle top with desired amount of powdered sugar.

Step 10

Cut into squares for serving