Preheat oven to 400° F. Grease a muffin pan with cooking spray.
In a medium mixing bowl, whisk together the flour, cornmeal, baking powder and salt. Set aside.
1 cup (120g) all-purpose flour, 1 cup (120g) fine ground yellow cornmeal, 1 tablespoon baking powder, ½ teaspoon salt
In a large bowl, combine the melted butter, honey and applesauce. Whisk to mix. Add the egg, buttermilk and vanilla and whisk until well combined.
4 tablespoons (57g) unsalted butter, ⅓ cup (113g) honey, ½ cup (123g) unsweetened applesauce, 1 large egg, 1 cup (240mL) buttermilk*, 1 teaspoon vanilla extract
Add the dry ingredients to the bowl with the wet ingredients. Stir with a rubber spatula until just combined. Be careful not to over-mix. The batter may be slightly lumpy and it will become thick and somewhat airy due to the baking powder mixing with the buttermilk. This is fine, just be sure to scoop and bake the muffins right away.
Scoop batter into the greased muffin pan, dividing it evenly between the 12 wells.
Bake for 13-15 minutes, until a toothpick inserted in the center of a muffin comes out clean. Let cool in the pan for 10 minutes, then remove to a wire rack. Serve warm, with butter and honey or as desired.