Vanilla Sheet Cake With Vanilla Buttercream Frosting

I was searching for a Vanilla Cake recipe for a friend's birthday and could not find what I wanted, so I combined a few recipes and came up with a very moist, flavorful cake. This recipe includes the cake mix extender I used.My DH who does not like a "white cake" loved it and our friend said it might be my best yet. I used bake even strips to ensure a flat top on the cake and baked at a lower temperature. Hope you enjoy it as much as they did.

• Ready In: 1 hr
• Serves: 15
• Yields: 1 9x13 cake

Ingredients

• cake

• 1 (18 ounce) package  vanilla cake mix
• 1 (3 1/2ounce) package vanilla instant pudding mix (4 serving size)
• 1  cup flour
• 1⁄2 cup sugar
• 1  teaspoon baking powder
• 4  eggs
• 1 1⁄4 cups milk
• 1⁄2 cup  vegetable oil
• 2  teaspoons vanilla extract

• frosting

• 1⁄2 cup butter or 1⁄2 cup margarine, softened
• 3 3⁄4 cups powdered sugar, sifted
• 3 -4  tablespoons milk
• 2  teaspoons vanilla extract

Directions

1. Preheat oven to 325 degrees.
2. Grease and flour a 9X13 baking pan.
3. Mix cake mix, pudding mix, flour, sugar and baking powder together in a large mixing bowl.
4. Add eggs, milk, oil and vanilla extract to dry mixture.
5. Beat with an electric mixer on low speed till ingredients are incorporated, about 30 seconds.
6. Stop mixer and scrape down sides of bowl with a spatula.
7. Increase the mixer speed to medium and beat for 1 1/2 minutes longer or until the batter is blended and smooth.
8. Pour into prepared pan and bake and bake for 50 minutes or until cake tests done.
9. Remove from oven and allow to cool on a wire rack in pan for 20-25 minutes before turning out on a cake board or platter. Once removed from pan put in freezer for 2 hours.
10. To prepare frosting, beat butter/margerine in a large bowl until well creamed.
11. Add sifted confectioner's sugar and 3 tablespoons of milk a little at a time until well incorporated, about 1 minute.
12. Add the vanilla, then increase mixer speed to medium and beat the frosting until it is light and fluffy, about another 1 longer.
13. Add the additional tablespoon of milk if the frosting seems to stiff.
14. Frost cake and decorate as desired.