Chocolate rhubarb brownies are a rich and decadent treat that has the best slightly tart flavor of rhubarb which cuts through the sweetness like magic.
Stir the wet ingredients into the dry ingredients and mix them until they are just incorporated. Add the rhubarb, chocolate chips, and nuts and mix until they are combined.
Pour the batter into the prepared baking dish and spread it out so that it is even. Bake for 20-25 minutes, or just until a toothpick inserted into the middle comes out clean.