These are the best zucchini bars! They taste like a moist spice cake with a cream cheese frosting. You'll find cinnamon, shredded zucchini and carrots, and walnuts in these bars. This is one of the best zucchini recipes I can think of!
Preheat oven to 350 degrees.Grease a 17x11x1 or 15x10x1 pan.
In a large bowl, add oil, sugar, eggs, and vanilla. Mix with a hand mixer for 1 minute until well combined.
In a separate bowl, sift flour, cinnamon, salt, baking soda, and baking powder. Whisk to combine.
Add the dry ingredients in with the wet ingredients. Mix with a hand mixer on low until the dry ingredients are incorporated.
Fold in the shredded zucchini and carrots.
Fold in rolled oats and walnuts.
Spread out on prepared pan. Place in the oven and bake for 24 minutes. Let cool completely and frost.
Frosting
In a large bowl, combine butter and cream cheese. Beat with the hand mixer until the mixture is smooth and well combined.
Add in vanilla and powdered sugar. Mix on low until the powdered sugar is well incorporated. Turn mixer on high and mix for an additional minute or two.