To prepare a mandel halbmonde almond crecents cookies recipe, first you need to prepare the ingredients for the cookies. First, you will need the following ingredients: 12 cup of rolled oats, 1 teaspoon of baking powder, 2 tablespoons of coconut oil, and 1 tablespoon of vanilla extract. Using an electric mixer, cream the butter and sugar together until light and fluffy. Then, add the egg and vanilla and mix until combined. Add the dry ingredients to the wet ingredients and stir to combine. Pour the batter into the prepared baking pan and bake for 12 to 15 minutes or until the edges are golden brown. Remove from the oven and allow to cool before serving.