Zucchini Bread Pancakes

Name: Zucchini Bread Pancakes
Ingredients: 1/3 cup walnuts; 1 large zucchini (about 12 ounces); 3/4 cup all-purpose flour; 1/2 cup whole wheat flour; 1 1/2 teaspoons baking powder; 1 1/2 teaspoons ground cinnamon; 1 teaspoon baking soda; 1 teaspoon kosher salt; 3/4 cup buttermilk, at room temperature; 1/3 cup dark brown sugar; 2 tablespoons unsalted butter, melted and cooled slightly; 1 teaspoon pure vanilla extract; 1 large egg, at room temperature; Vegetable oil, for the skillet; Salted butter, for serving; Maple syrup, for serving