Gluten-Free Fudgy Brownies

Ingredients

• 1/2 cup butter ((or, ghee, coconut oil))
• 1/2 cup olive oil (extra virgin)
• 1 3/4 cup sugar (or maple sugar)
• 3 large eggs
• 1 1/2 teaspoons vanilla
• 3/4 teaspoons salt
• 2/3 cups cassava flour
• 1 1/2 cups cocoa powder (sifted)
• 1/2 teaspoon baking powder
• 3/4 teaspoon cream of tartar
• 3/4 cup walnuts (chopped)
• 3/4 cups dark chocolate (chopped (or chocolate chips))