To prepare a truffle centred beignets recipe, first you will need to prepare the ingredients for the truffles. First, you'll need the following ingredients: 1 tbsp melted butter, 2 tablespoons caster sugar, 1 tablespoon vanilla extract, 1/2 teaspoon salt and 1 teaspoon nutmeg. Mix the butter and sugar together until the mixture is light and fluffy. Then, add the egg yolks and beat them together with an electric mixer until they're stiff peaks. Add the flour and mix until it's just combined. Fold in the chocolate chips. Pour the batter into the greased and floured muffin pan. Bake the muffins for 12 to 15 minutes or until golden brown. Remove from the oven and allow them to cool for 5 minutes before serving.