Line a 9x9 pan with parchment paper and preheat your oven to 335 degrees Fahrenheit.
In a large mixing bowl add the white sugar, brown sugar, and melted butter and mix until combined.
Next, add the eggs, egg yolk, and vanilla and mix until just combined.
Then, add in the vegetable oil and cocoa powder and mix gently.
Add the red food gel and mix until combined.
Next, add the flour, cornstarch, and salt and mix until there are no more clumps.
Then, add the vinegar and mix well.
Pour the batter into the prepared pan and bake in your oven for 20-25 minutes until a toothpick comes out clean.
Remove from your oven and allow it to completely cool before frosting. While the brownies are cooling, make the frosting.
In a medium mixing bowl beat the butter and cream cheese together until smooth.
Next, add in the powdered sugar until light and fluffy.
Then, add the vanilla and beat until combined.
Finally, frost the top of the brownies, add sprinkles then serve and enjoy!
Video
Notes
You can store any leftovers of your red velvet brownies in an airtight container on your counter at room temperature for 3-4 days. You can store them in your fridge in an airtight container and they will last 5-7 days.If you want to freeze these brownies, I would recommend wrapping them individually and placing them in a freezer safe bag and they will last in your freezer for up to 2 months.To reheat you can, thaw the brownies to fridge temperature and you can microwave your brownies for a few seconds until warm.