To prepare a Abbeys Easy chocolate chip cake mix bar cookies recipe, first you need to prepare the ingredients for the cookies. First, you'll need the following ingredients: 14 cup chocolate chips (chocolate chips can be purchased at most grocery stores) 1 egg, 1 teaspoon vanilla extract, and 1 tablespoon baking powder. Mix the dry ingredients together until they're just combined. Add the wet ingredients and mix until the batter is smooth. Press the mixture into the greased and floured cookie sheet. Bake for 12 to 15 minutes or until cookies are lightly browned. Remove from the oven and let cool on the baking sheet for 5 minutes before transferring to wire racks to cool completely.