These Party Size Sheet Pan Brownies are the answer to ‘what to make for a party’. They are fudgy and decadent and SO easy to make, especially ahead of time. Packed full of milk and white chocolate chips with a white chocolate drizzle, they make for a great addition to any event snack or dessert table!

These can be made in advance and stored in a container before serving, giving you more time to get ready/get the kids ready/prep drinks or snacks that you want to serve warm. Entertaining is so much fun for me, but I love a hack that makes it come together more smoothly!

For these brownies, we rely heavily on the melted butter and light brown sugar to give the fudgy texture and super shiny topping. To make the shiny top on a brownie, there are arguments as to whether it’s the egg, or the molten sugar in the butter, so let’s make sure to do both. This recipe cuts neatly into 20 pieces. They keep well an airtight container for a few days. That said, they don’t last long if you’ve got lots of happy hungry mouths in the house!

WHEN IT COMES TO MAKING THE BEST BROWNIES, HERE ARE A FEW TIPS TO KEEP IN MIND:

Quality Ingredients: Always use high-quality ingredients in your brownie recipe. This includes using good quality chocolate, cocoa powder, and fresh eggs. It will make a noticeable difference in the taste and texture of the brownies.
Don’t Overmix: When combining the ingredients, be gentle and avoid overmixing the batter. Overmixing can lead to a denser and tougher texture. Mix until the ingredients are just combined.
Proper Pan Size: Use the recommended pan size mentioned in the recipe. Using a smaller or larger pan can affect the baking time and the texture of the brownies. For these fudgy and moist brownies, I recommend a 9×13 inch rectangle baking tin.
Do Not Overbake: Keep a close eye on the brownies while they are baking and avoid overbaking them. A slightly underbaked brownie will be fudgy and moist, while an overbaked one can turn out dry. Insert a toothpick into the center – if it comes out with a few moist crumbs, the brownies are done.
Let Them Cool: Allow the brownies to cool completely in the pan before cutting and serving. This helps them to set and ensures that they hold their shape. It also allows the flavors to develop fully.
Experiment with Additions: Feel free to get creative with your brownie recipe by changing up the chocolate chips/chocolate chunks, or by adding nuts or fruit. Just make sure not to overload the batter, as it may affect the texture.

Remember, practice makes perfect when it comes to baking brownies. Don’t be afraid to make tweaks and adjustments to the recipe to suit your preferences. You can totally shift the frosting quantity for more or less, just do what suits you!

INGREDIENTS REQUIRED for Party Size Sheet Pan Brownies

There are no specialist ingredients or equipment required for this bake. I can find everything I need at my local supermarket or grocery store. I use a standard 9×13 inch baking tray for these brownies, perfect to feed a crowd. If yo To line a baking tin, cut two pieces of baking paper that are just narrower than the width of the tin (less than 8 inches wide). Then place one on top of the other in opposite directions, so that all four edges of the tin are covered. This will make removing the bake so much easier!

Dark/Semi-Sweet Chocolate
Unsalted Butter
Light Brown Soft Sugar
Granulated Sugar
Large Free Range Eggs
Vanilla Extract
Plain (All Purpose) Flour
Cocoa Powder
White Chocolate Chips

TOP TIPS FOR THE BEST Party Size Sheet Pan Brownies

Melted Butter: As mentioned above, this contributes to the shiny top! Try to use the melted butter while it is still warm as this allows the sugar to fully dissolve.
Melted Chocolate: Try to use a higher quality dark chocolate where possible, as this really does contribute to that final flavour. Melt either in the microwave or over a double boiler for more control.
Light Brown Sugar and Granulated Sugar: It is the combination of both sugars that creates the fudgy texture and rich flavour.
Cocoa Powder: Again, where possible try to use a higher quality make. This contributes so much to the flavour and I find some cheap ones really dull the richness!
Chocolate Chips: I mix in both milk and white chocolate chips for the ultimate brownie. Drizzle over some melted white chocolate for a prettier finish!

For my Party Size Sheet Pan Brownies, I use a basic 9×13″ sheet pan. I also recommend a good stand mixer or high speed mixer (like this one) to make the brownie mixture. If you want more wild brownie recipe ideas, check out my Tiramisu Brownie Cups. For videos and baking inspiration, head on over to my Instagram. If you make this recipe, don’t forget to drop it a star rating, leave a review or share a photo on your socials!

Storage/Make Ahead

These store perfectly well at room temperature. Be sure to place in an airtight container before placing in the pantry/cupboard. You could wrap up individually or place as the whole slab into the container. Because of this, you can make these the day before your event so they’re ready to go!

Alternatively, you can freeze the brownies either as the whole slab or in slices. Completely wrap as tight as you can using cling film/Saran wrap. If you have an airtight container too, place it in there before freezing. Let thaw in the fridge before serving!