Preheat the oven to 400 degrees.
In a small bowl, mix all of the dry ingredients.
In a separate bowl, whisk together the melted butter, egg, whole milk, sour cream, green onions, zucchini, and half a cup of cheddar cheese.
Fold in the wet ingredients into the dry. Don't over mix the batter, or the muffins will be tough.
Line your muffin pan with paper liners and pan spray them.
Evenly divide your mixture among the muffin cups and sprinkle the remaining cheddar cheese on top of the muffins. For a garnish, add half a cherry tomato cut side up in the center of each muffin.
Bake for 20 minutes until golden brown. Serve warm.
Notes:
These are delicious with eggs for breakfast or brunch, and as a side for soups, stews or salads.