Prepare all the ingredients

Mix the flour and baking powder

Melt the butter

Add egg, milk, sugar, salt into the butter

Mix both dry and wet mixture

Add the mixture to the cup until 1/3 full

You may add your flavor now! (I love "2 broke girl" bacon cupcake, so try adding bacon and cheese in my muffins!)

Fill the cup with the mixture until it's 2/3 full

Bake for about 30 minutes

Enjoy your muffins!