Peppermint Pattie Poke Cake

Cake:
1 box Betty Crocker super moist triple chocolate fudge cake mix
And the water, vegetable oil and eggs called for in cake mix directions

Filling:
1 box (4 serving size) white chocolate instant pudding and pie filling mix
2 cups milk
1/2 tsp. peppermint extract

Frosting:
1/4 tsp. peppermint extract
1 container Betty Crocker Whipped milk chocolate frosting
3/4 cup coarsely chopped chocolate-covered peppermint patties(about 8 york peppermint patties pieces)

-Heat oven to 350 degrees. Make cake as directed for 13x9 pan. Cool 15 minutes. Poke top of warm cake every 1/2 inch with the handle of wooden spoon.
-In a medium bowl beat filling ingredients with wire whisk about 2 minutes. Immediately pour over cake. Cover loosely and refrigerate about 2 hours or until chilled.
-Stir 1/4 tsp. peppermint extract into frosting. Spread frosting over top of cake. Sprinkle with peppermint patties.