Preheat oven to 350 degrees.Mix butter and brown sugar together, then add vanilla and eggs one at a time, beat until each is incorporated.Add baking powder and flour, mix well on medium speed.Add the mini chocolate chips and blend so they are all incorporated.Flour your surface and roll out dough or roll dough between 2 sheets of wax paper. And use a flat rolling pin on ¼ inch dowels on each side of the wax paper so the cookie thickness is even with all the cookies.The chips do make it more challenging to roll the dough, but it will come together easily to be cut into shapes.Cut with a cookie cutter and bake on a parchment-lined baking sheet for 10 minutes.Allow cookies to cool completely before stacking.