Preheat oven to 350 ℉.
Line an 8 inch square baking pan with parchment paper.
Sift together flour, powdered sugar, cocoa powder, baking powder, salt and set aside.
Place chocolate and butter in saucepan. Heat over low heat, stirring until smooth and combined.
Remove the saucepan from heat and stir in corn syrup.
Let cool until just warm to the touch, about 5 minutes.
Add eggs one at a time, mixing well in between each egg. Add in vanilla and red food coloring. Be sure to mix in the the food coloring now before adding the flour so it can fully combine.
Add dry ingredients until just combined and smooth.
Add the brownie mix to the prepared baking pan and spread to edges using a knife of offset spatula.
Bake 22-25 minutes until center begins to feel firm and can be pricked with a toothpick that comes out clean.
When done, remove from oven and let cool 15-20 minutes.
If adding frosting, continue to cool until no longer warm to the touch before adding the frosting.. Cut into 2 or 3 inch squares. Enjoy!
Let cool and cut into 2 by 2.5 inch squares