Makes 9 large squares
6 tablespoons unsalted butter
40 jumbo-size marshmallows
1/3 cup malted milk powder
1/4 teaspoon coarse sea salt plus extra for sprinkling on top
6 cups Rice Krispies ceral
1 cup roughly chopped pretzel M&Ms, plus extra for sprinkling on top
In a very large saucepan, melt the butter over medium heat. As soon as the butter starts to brown, turn the heat to low and add the marshmallows. Stir until the marshmallows are melted and combined with the butter. Stir in the malted milk powder and salt and combine well. Add the Rice Krispies to the marshmallow mixture and stir vigorously to combine. Add one cup of the M&Ms and mix well.
Press the mixture into a 9x9 pan. Press the remaining M&Ms into the top of the treats and sprinkle lightly with sea salt. Put the pan in the refrigerator to set the treats, about half an hour. Cut into squares before serving.