Preheat oven to 375 degrees 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 if necessary. Shape 1 tablespoon of dough around 1 peanut butter center, covering completely. Place 2 inches apart on ungreased cookie sheets. Flatten somewhat with bottom of glass dipped in sugar.

Bake 7 to 9 minutes or until set and slightly cracked. Cool on wire racks.