Preheat oven to 400°F.

Place chocolate chips in a small bowl.

In the microwave heat ¾ cup of heavy cream until it boils (approximately 45 seconds - 1 minute).

Pour the hot cream over the chocolate chips. Let the mixture sit for 1 minute then stir until the chocolate chips are all melted and the mixture is smooth. You may microwave it for 15 seconds at a time if you need to melt the chocolate chips a little more.

Repeat the process with the peanut butter chips and the remaining ½ cup of heavy cream.

Pour the melted chocolate into an 8-inch cast iron skillet, or an 8x8 inch casserole dish. Then pour the peanut butter over the chocolate. Use a spoon to swirl them together.

Arrange marshmallow peeps on top of the chocolate and peanut butter.

Bake in oven for 5-7 minutes, or until the marshmallows are nicely toasted.