Preheat oven to 375 F. Cookie Dough: In a small bowl, combine flour, cocoa and baking soda. In a large bowl, beat sugar, brown sugar, margarine and 1/4 cup peanut butter until light and fluffy. Add vanilla and egg; beat well. Stir in dry ingredients. Set aside. Filling: In a small bowl, combine filling ingredients. Roll into 30 - 1 inch balls. Flour hands. Shape 1 tablespoonful of dough around 1 peanut butter center covering completely. Place 2 inches apart on ungreased cookie sheet. Flatten with bottom of glass dipped in sugar. Bake for 7-9 minutes or until set and slightly cracked. Cool on wire racks.
