Should you grease a cookie sheet?

Online Answer
Should I grease my cookie sheets? Unless the recipe tells you to grease the cookie sheet, resist the impulse. The extra grease causes cookie dough (which already contains a lot of fat) to spread. If you're concerned about cookies sticking, line the cookie sheet with parchment paper or a silicone non-stick mat.
Related Questions 📌
Your baked goods won't stick to it, and when you're done you can throw out the parchment instead of washing the pan. If you have no parchment paper, you can still bakeyou'll just have to be a bit more creative..
So one way to get the best of both: Use half butter and half shortening. By the way "butter" here is butter. Real butter, not margarine.
If a recipe calls for a tablespoon of baking powder, you'll want to substitute with a teaspoon of baking soda. You'll also want to add 2 teaspoons of vinegar or lemon juice to your batter.