Line a 20cm (8 inch) square baking tin with cling film or greased baking paper.
In a large saucepan melt the butter, mini marshmallows, and milk chocolate over a low heat. Stir often to prevent the mixture from sticking to the bottom of the saucepan.
100 g Salted Butter, 100 g Mini Marshmallows, 100 g Milk Chocolate
Take the melted chocolate mixture off the heat and stir in the rice krispies and 100g of the mini eggs.
150 g Rice Krispies, 100 g Mini Eggs
Spoon the mixture into a deep 20cm baking tin lined with cling film (or greased baking paper) and use a spatula to press it down evenly. Place in the fridge whilst you make the chocolate topping.
Melt the milk chocolate, dark chocolate, and a few drops of vegetable oil in the microwave. Do this in 20-second intervals to prevent the mixture from burning and going grainy. Spread the melted chocolate onto the rice krispie layer with a spatula or spoon, then sprinkle over the remaining mini eggs. Chill for 1 hour before cutting into squares.
100 g Milk Chocolate, 100 g Dark Chocolate, ⅛ teaspoon Vegetable Oil, 196 g Mini Eggs