Combine brownie mix with about 1/4 cup of beer (I used Rogue Chocolate Stout). If mixture seems too thick, add a little more beer.
Spoon about 1 TBSP of mixture into mini brownie pans (included in box). Follow directions for baking time.
After brownies have cooled a bit, combine cinnamon and powdered sugar into a bowl. Add beer until mixture can be easily drizzled. Top cooled brownies with glaze. Refrigerate 30 minutes to let glaze set.