Cream butter, peanut butter & sugar.
Add egg and vanilla and mix well.
Blend in flour.
Stir in 1 c. crushed malted milk balls; form into 1 inch balls and refrigerate until firm.
Melt white chocolate over low heat; dip cookie dough balls halfway in white chocolate.
Place chocolate side up on baking sheet lined with wax paper.
Sprinkle with finely crushed malted milk balls.