Put flour, egg, vanilla extract, salt, milk, baking powder, melted butter and 90 grams of sugar in a mixer. Mix them together.
Put your paper cases in a muffin tin.
Fill each muffin case with a tablespoon of batter.
Bake your muffins in the oven (180º for 15 minutes).
They should be golden.
Melt the remained sugar in a small pot at low heat. Stir it from time to time.
The sugar will brown.
Add the cream into the hot sugar, slowly and with a gentle stir. Mix them carefully.
Cut your muffins into halves.
Spread the mou cream over your muffins.
They're done :)