1. Place a rack in the center of the oven, Preheat the oven to 350• F. Coat an 8-inch square baking pan with cooking spray.
2. Melt the butter in medium-size microwaveable bowl. Add the chocolate and let stand for 2 minutes. Using a whisk, stir vigorously until the chocolate is melted and the mixture is smooth. If necessary, let stand until lukewarm, 3-5 minutes.
3. Whisk in the sugar and Monk Fruit In The Raw® Bakers Bag. One at a time, whisk in the eggs. Stir in the vanilla. Using a flexible spatula, mix in the flour; leaving some white streaks is better than over-mixing. Stir in the nuts. Spread the batter in the prepared pan in an even layer.
4. Bake for 22 minutes, or until a toothpick inserted into the center comes out almost clean. Set the pan on a wire rack and cool completely. Cut the brownies into 12 squares.