Creating Brownie Ice Cream Sandwiches is a fun and rewarding process. Just follow these easy steps:

1. Preheat the Oven: Preheat your oven to 350°F (175°C). Grease a 9×13-inch baking pan or line it with parchment paper.

2. Melt Butter: In a large saucepan, melt the butter over low heat. Remove from heat and stir in the sugar, eggs, and vanilla until well combined.

3. Mix Dry Ingredients: In a separate bowl, mix the flour, cocoa powder, salt, and baking powder.

4. Combine Ingredients: Gradually add the dry mixture into the butter mixture, stirring until just combined. Avoid over-mixing.

5. Pour Batter: Spread the brownie batter evenly in the prepared baking pan.

6. Bake: Bake in the preheated oven for 25–30 minutes, or until a toothpick inserted into the center comes out with a few moist crumbs.

7. Cool the Brownies: Allow the brownies to cool in the pan for about 30 minutes. Once cooled, lift them out of the pan using the parchment paper and place on a wire rack.

8. Slice Brownies: Cut the brownies into squares or rectangles, depending on your preferred sandwich size.

9. Scoop Ice Cream: Use an ice cream scoop to carefully place a generous scoop of ice cream on one brownie piece.

10. Top and Press: Place another brownie piece on top of the ice cream, pressing gently to create a sandwich.

11. Optional Toppings: Roll the edges in sprinkles or chopped nuts if desired for added texture and decoration.

12. Freeze the Sandwiches: Place the assembled sandwiches on a tray and freeze them for about 15-20 minutes before serving to help them hold together.