Preheat oven to 350 F.
Brush the muffin pan with butter.
Add flour, baking powder, and salt to a bowl and mix together.
Make a hole in the middle of the flour and add sugar.
Beat egg and cream with a hand mixer.
Add the egg/cream mixture. and the coffee into the flour. Beat well with the hand mixer.
Pour the muffin mix into the muffin pan.
Bake for 20 minutes. To ensure they are fully cooked, poke with a knife. If the knife comes out dry they are ready, if not bake more.
Allow the muffins to cool and then decorate with powdered sugar.