Brownie Ice Cream Pizza

1. Prepare brownies as directed on the box.
2. Spread one box of prepared brownie batter onto a parchment-lined 12-inch foil pizza pan, spreading to the edges.
3. Repeat with the second box of brownie batter on another parchment-lined 12-inch foil pizza pan.
4. Bake both brownie crusts at 325°F for 30 minutes. Cool completely.
5. Line a clean pizza pan with parchment paper.
6. Spread the vanilla ice cream into an even circle on the parchment-lined pan.
7. Freeze the ice cream for 2 hours, or until firm.
8. Once the brownies are cool, flip one brownie upside down onto a serving plate or a new parchment-lined pan.
9. Carefully place the frozen ice cream circle on top of the upside-down brownie.
10. Top with the second brownie.
11. Freeze the assembled brownie ice cream pizza for an additional 1 hour, or until firm enough to slice.
12. Cut into slices and serve.