You can use butter instead of butter spray.
Butter can also add flavor to the food and help prevent the food from sticking.
Butter is a natural nonstick layer which tastes better than butter sprays.
The butter is also soft enough to spread into loaf pans and muffin tins with your fingers.
You can also buy gadgets to turn a stick of butter into a butter spray.
Shortening oil or lard can also be used as alternatives to butter spray to create a nonstick surface.
To make your own butter spray melt about 2 tablespoons of unsalted butter and let it cool until warm.
Whisk in 2 teaspoons of any neutral flavored oil such as grapeseed or avocado, but anything you have on hand will do. Pour it into a food-safe spritzer bottle and spritz away.