The secret ingredient to brownie texture is fat. The more oil or butter you add, the fudgier your baked goods come out. However, this is only true if you make brownies with all-purpose flour. To make fudgy brownies with less fat, try healthier flour like oat flour or almond flour. Then, use melted chocolate chips instead of using only cocoa powder. Finally, using a combination of liquid sweetener and crystal sugar is a great way to add a chewy, fudgy texture.