Gather the ingredients.
Whisk flour, baking powder, baking soda, salt, cinnamon, cloves, and nutmeg together in a large bowl.
Combine buttermilk, sugar, egg, and butter in a measuring cup; whisk well. Stir in shredded zucchini, and walnuts, then add to the dry ingredients. Fold together just until no dry spots remain.
Heat a large nonstick skillet or griddle over medium heat; grease with butter.
Working in batches, scoop ¼ cup batter per pancake into the skillet. Cook until bubbles begin to form on surface of pancakes and edges start to look dry, 2 to 3 minutes.
Flip, and cook until fluffy and slightly firm, about 2 minutes. Repeat with remaining batter, adding butter and adjusting heat as needed.
