Grease a large mixing bowl with butter.

In a saucepan, melt the butter over low heat and add the marshmallows, stirring until completely melted and smooth.

Remove from heat and stir in the Rice Krispies cereal until evenly coated.

Allow the mixture to cool slightly, then shape it into egg shapes using your hands.

Melt the chocolate melts in a microwave or double boiler.

Dip each Rice Krispies egg into the melted chocolate, then place it on a parchment-lined tray.

Immediately sprinkle decorations on top before the chocolate hardens.