In a large bowl, stir together flour, baking powder, baking soda, and salt.
1 cup all-purpose flour, 2 teaspoons baking powder, 1 teaspoon baking soda, 1/4 teaspoon salt
In another bowl, mix together zucchini, brown sugar, and cinnamon. Stir in vanilla, egg, and milk.
3/4 cup grated zucchini, 2 tablespoons brown sugar, 1/2 teaspoon ground cinnamon, 1 teaspoon pure vanilla extract, 1 large egg, 1/2 cup milk
Stir wet ingredients into flour mixture until just combined, then stir in walnuts.
1/2 cup chopped walnuts
Heat your griddle and spray with nonstick spray, if desired.
Stir melted butter into pancake batter.
1 tablespoon butter
Using a 1/4 cup scoop, scoop batter onto griddle. Cook pancakes until bubbles form and pop on the surface, then flip and cook for an additional 1-2 minutes. Repeat until all batter is used.
Serve with maple syrup and additional walnuts, if desired.