3 tablespoons butter
1 package (10 ounces) mini marshmallows
1 teaspoon vanilla extract
1/2 teaspoon salt
4 cups Lucky Charms cereal
1 pint French vanilla ice cream
Spray a baking sheet with nonstick baking spray and set close to the stove.
Heat butter, marshmallows, vanilla, and salt in a large pot set over medium heat. Cook down until melted, about 5 minutes, stirring continuously with a heat-proof spatula. Remove the pot from heat and pour in the Lucky Charms cereal. Stir with a spatula until evenly coated with marshmallow mixture. The consistency will be very thick and slightly difficult to stir.
Scoop out the Lucky Charms mixture onto the baking sheet and press down into the pan, flattening as much as possible. Your hands will be very sticky, but keep pressing down hard to create an even layer of Lucky Charms.
Allow to set and cool for about 5 minutes then cut out circular shapes using a cookie cutter. You can store the "cookies" in a sealed container for a few days at this point.
To serve, smear about 1/4 to 1/3 cup ice cream between two Lucky Charms cookies, creating a sandwich. (Best eaten while watching cartoons.)