preheat oven

cream room temperature butter

add sugar and mix

add eggs 1 at a time and mix

sift flour and mix

add a bit of milk at a time so it doesn't overflow

add vanila

add and baking powder

place liners in cupcake/muffin pan. Place 1 oreo at the bottom of each liner then pour batter into them but don't put too much or else they'll overflow

bake untill toothpick inserted into middle of cupcake comes out clean