Preheat the oven to 350°F. Grease an 8x8 baking dish with butter or nonstick cooking spray (or line it with parchment), then set aside.
Add the butter, sugars, and vanilla extract to a large mixing bowl and stir until fully combined.
¾ cup granulated sugar, ½ cup light brown sugar, 1 stick unsalted butter, 1 teaspoon pure vanilla extract
Add the milk, then mix in the eggs one at a time, stirring just until combined.
2 teaspoon milk, 2 large eggs
In a separate medium bowl, whisk together the dry ingredients. Add them to the wet ingredients in intervals, mixing until smooth.
¾ cup high quality gluten-free all purpose flour containing xanthan gum, ½ cup unsweetened cocoa powder, ½ teaspoon baking soda, ½ teaspoon salt
Optional: Fold in the chopped nuts or chocolate chips, reserving ¼ cup.
½ cup chopped nuts or chocolate chips
Let the batter rest for 15 minutes to allow the rice flour to absorb moisture and reduce any grittiness.
Pour the batter into the prepared pan, smooth the top, and sprinkle the remaining ¼ cup of toppings over it.
Bake for 30 to 40 minutes, or until a toothpick inserted in the center comes out clean and the edges are crisp. Let the brownies cool in the pan for at least 15 minutes before cutting (allow to cool completely for cleaner slices).
Enjoy!
Notes
Store homemade gluten-free brownies in an airtight container at room temperature for 2–3 days.To freeze, wrap and store them in an airtight container. When ready to eat, let a brownie thaw at room temperature for about 30 minutes or overnight in the fridge. You can also warm it in the microwave for 10–30 seconds.