Steps
1. Preheat your oven to 350°F (175°C).
2. In a small bowl, combine gluten-free flour, cocoa powder, sugar, and salt.
3. Add melted butter, milk, and vanilla extract to the dry ingredients; mix until smooth.
4. Fold in chocolate chips if using.
5. Pour the batter into a small oven-safe ramekin or baking dish.
6. Bake for 15-18 minutes, until the edges are firm but the center is still slightly soft.
7. Let cool for a few minutes before enjoying your warm brownie.