Can I use butter instead of cupcake liners?
Dip a paper towel or pastry brush into the melted butter and use it to grease each cup of the pan. This method is probably the best if you opt to use butter in place of paper liners as you will really be able to grease the cupcake tin well.
What can I use in muffin mix if I don’t have a muffin pan?
All you need to do is a sheet pan lined with parchment paper that reaches the edges of the pan or a sheet pan that is greased well. Simply pour the batter onto the sheet pan and bake according to your recipe’s instructions.