Preheat the oven to 350° F. Grease an 8x8 pan with nonstick spray and line with parchment paper.
Mix together all brownie ingredients. Pour the batter into the prepared pan. Bake for 30 minutes until the edges are crispy and the center is just set.
With a standing or handheld mixer, whip together the vegan butter, cream cheese, nut butter, lemon juice, and vanilla. In batches, sift in the powdered sweetener, alternating with the milk as needed until you reach your desired consistency.
When the brownies are done, cool completely before removing from the pan and topping them with the frosting. Enjoy! 🤍
