What is wrong with this recipe? ?

Try 1 tsp of baking soda instead of baking powder and a full stick of er. (It's just 2 TBSP more). Baking powder seems to be the wrong kind of leavening for a recipe that has more acid than alkaline ingredients. Bake them for at least 15 minutes and check. If you use a toothpick to see if it's done; very few crumbs clinging is okay. It's when you see a wet streak of batter that it requires longer baking.