In a medium bowl, combine olive oil, brown sugar, chili powder, minced garlic, onion powder, black pepper, paprika, and garlic salt. Stir until completely combined.
Rub the spice mixture all over both sides of the chicken.
Pour out (or drink!) a little of the beer from the can. You don’t want the can to be completely full to avoid overflow during the cooking process. Place the can of beer onto the center of the baking sheet.
Before lifting the chicken, open the cavity between the legs and make sure to stretch it open wide. Carefully lift the chicken and position the open cavity over the beer can.
Bake for 90 minutes.
Remove from oven and let rest for 10 minutes. Remove can from chicken.
Light lagers are the most common choice because they don’t overpower the chicken’s natural flavors. However, some may argue that you don't get much flavor from the beer at all. I would suggest using your favorite affordable beer for this recipe. Feel free to experiment with other beverages such as cola or non-alcoholic beer.
You can substitute with your favorite blend of spices and seasonings if preferred.