BASE:

1/2 c. creamy peanut butter
1/3 c. butter flavor Crisco
1 1/2 c. firmly packed brown sugar
2 eggs
1 1/2 c. all-purpose flour
1 1/2 tsp. baking powder
1/2 c. milk
1/2 tsp. salt
1 tsp. vanilla

Cream peanut butter and Crisco in large bowl at medium speed. Blend in brown sugar. Beat in eggs until creamy. Combine flour, baking powder and salt in small bowl; set aside. Combine milk and vanilla in measuring cup. Add dry mix and milk alternately to creamed mixture. Scrape sides of bowl often and beat until blended.

Spread batter into greased 15x10x1 pan and bake at 350 degrees for 18-20 minutes.

FROSTING AND DRIZZLE:

2/3 c. creamy peanut butter
1/4 c. butter flavor Crisco
1/2 c. milk
4 c. (1 lb.) powdered sugar
1/2 c. chocolate chips

Cream peanut butter and Crisco. Add sugar and milk; beat until fluffy and spread on cooled base. Melt chocolate chips; drizzle from end of spoon back and forth over frosting. Cut into 2-inch squares. Refrigerate until chocolate is firm.