Can you use paper baking cups if the recipe calls for foil baking cups?

Start with a clean square shaped paper. Fold paper in half so it looks like a triangle. Starting from left to right label the corners A, B, and C Fold corner C so that the top edge is parallel with the base of the triangle (you should see three smaller triangles) Then starting from the left to the right label the corners D, E, and F. Now fold corner A so it touches corner F. (just like step 4) Now you should have two flaps on top. Fold the first flap on top down towards the base of the original triangle. Flip cup over so the E is face down, and fold the other flap down. Pick up your cup and pinch the edges together. you should now see the inside of the cup. Fill your cup with water. If it leaks start at step one.