Bubbling Witch's Cauldron Brownies

Directions

1. Heat the oven to the temperature specified on the brownie mix box, then prepare the batter according to the package directions.
2. Coat a mini muffin pan with non-stick spray. Fill each cup about two-thirds full with the brownie batter.
3. Bake for 10 to 15 minutes, or until a toothpick inserted into the center comes out clean.
4. Take the pan out of the oven and use a half-tablespoon measure to press a well into each brownie. Let them cool completely before removing from the pan.
5. For the buttercream, beat the softened stick of butter with an electric mixer until smooth, about 30 seconds. Gradually add 1 to 2 cups of powdered sugar, beating until well combined. Add a small amount of green gel food coloring and mix thoroughly.
6. Drop a dollop of the green buttercream into the indentation of each brownie using a spoon. Use the spoon to swirl the buttercream into wispy peaks.
7. Sprinkle large and small green nonpareils onto the buttercream. For a bubbling-over effect, let some buttercream spill down the side of the brownie and add nonpareils there as well.
8. Insert a broken pretzel stick into each cauldron to serve as a stirring spoon.
9. Serve immediately or store at room temperature if serving the same day; otherwise, place in an airtight container until ready to serve.