Easy Graham Cracker Eclair Cake!

Ingredients

• 1 pkg. (3.4 oz.) JELL-O Vanilla Flavor Instant Pudding
• 1-1/2 cups cold milk
• 15 graham crackers, broken crosswise in half (30 squares), divided
• 1 tub (8 oz.) COOL WHIP Whipped Topping, thawed
• 1 cup BAKER'S ONE BOWL Chocolate Frosting