red/burgundy food coloring
yellow food coloring
2 sandwich bags
circle cookie cutter or a small lid
After you bake the cupcakes take them out of the liners and cut the middle of the cupcake out leaving the muffin top and about an inch on the bottom. This will leave you with the hamburger buns. After you bake the brownies in a 9 x 13 pan, cut out the hamburger circles using a cookie cutter or a lid. (I used a nutella lid because it was the perfect size to make the brownies fit inside the cupcakes.)
Next dye some icing red/burgundy and yellow. This will be your ketchup and mustard. Put the dyed icing in ziploc baggies and cut the end of a corner. Squeeze the icing onto the brownie just like you would ketchup and mustard but make sure to get lots on the edge so that it squishes and runs over when you put the bun on.
One last thing, dab some sesame seeds on the top of the cupcakes. Sesame seeds are practically tasteless but add so much to the look. And thats it, so easy and SO cute!! They were a huge hit at the cookout and I will most definitely be making these mini sliders again!