Take the ice cream out of the freezer and let set for five minutes.
Cut your brownies into 2" x 3" rectangles and remove from pan.
Place 1 brownie, upside down, onto a flat surface (not the palm of your hand) and place 1 scoop of ice cream onto the brownie. Use a knife to flatten and smooth the ice cream and spread it a bit on the brownie.
Place another brownie on top of the ice cream to make a sandwich. Gently press together.
Use the edge of a knife to smooth the ice cream on the sides and fill in any holes.
Dip the edges of the brownie into sprinkles.
Place back into the freezer for 1-2 hours until ready to serve.