1-First Step: Prep the pan and oven Start by preheating your oven to 350°F. Line an 8-inch or 9-inch square baking pan with parchment paper, or lightly grease it if that is what you have on hand. This helps the brownies lift out cleanly after baking.

2-Second Step: Mix the brownie batter In a large mixing bowl, combine the 18.3 ounce box fudgy brownie mix, 2 large eggs, 2/3 cup vegetable oil, and 3 tablespoons water. Stir until the batter looks smooth and thick. Do not overmix, since that can make the brownies a little tough instead of soft and fudgy.

3-Third Step: Bake the brownies Spread the batter evenly into the prepared pan. Bake for about 20 to 28 minutes, depending on your oven and the pan size you use. The brownies are ready when a toothpick inserted near the center comes out with a few moist crumbs, not raw batter.

4-Fourth Step: Cool completely Let the brownies cool in the pan for at least 30 to 45 minutes, then move them to a wire rack if needed. Cooling is important because warm brownies can melt the frosting. If you want extra clean edges, chill the pan for a short time before spreading on the topping.

5-Fifth Step: Make the frosting In a medium bowl, beat 8 ounces softened cream cheese with 1/2 cup powdered sugar and 1 teaspoon vanilla until creamy and smooth. If you like a slightly sweeter topping, you can add a spoonful more powdered sugar. For a lighter texture, whip the frosting a little longer so it becomes fluffy.

6-Sixth Step: Frost and garnish Spread the frosting evenly over the cooled brownies. Finish with 1 to 2 teaspoons festive sprinkles. This small touch gives the Deviled Brownies a fun, bakery style look that works well for birthdays, holidays, and classroom parties.

7-Seventh Step: Slice and serve Use a sharp knife to cut the brownies into squares or rectangles. Wipe the knife between cuts for cleaner slices. Serve them on a platter, or pack them in containers for lunchboxes, potlucks, or a sweet afternoon treat.