I have quiet a few variations (peanut butter, oatmeal, marshmallow) with this brownie, but this is the basic brownie.
2 cubes butter
1/3 cup cocoa
2 cups sugar
4 eggs
2 tsp. vanilla
2 cup Gluten free flour
1-1/4 tsp xantham gum
Preheat oven to 350 degrees. Melt butter, Stir in cocoa, sugar, eggs, & vanilla. In a separate bowl mix gluten free flour and xantham gum. Add flour mixture to the wet ingredients. Mix well. The batter will be a little thick so I usually try and plop it on in different areas and then smooth it as even as possible in the pan. You want to be careful not to lift the sugar off the bottom of the pan. Bake for 40-50 minutes. Stick a toothpick in the center to make sure it is done. My oven takes 42 minutes, but my mother-in-laws takes almost 50 minutes, so figure out your oven and then just make a note of it. That is my tip for the day.