Mix Ingredients A in a mixer till it become a paste form.

Add egg and vanilla essence and mix well.

Mix and sift Ingredients B

Fold in Ingredients B into the above mixture(do not over mix), then mix in Chocolate Buttons till no visible flour

Chill the dough for at least 30 min.

Preheat oven 180C, baked for 12-15 min or till the edge of the cookie turn darker