Preheat oven to 400 F. Spray a Non-Stick 12-Cup Regular Muffin Pan with floured cooking spray or grease and flour the pan; set aside. Recipe makes about 14 muffins but I made 12 muffins and used a mini loaf pan for the remaining batter rather than dirtying another muffin pan or discarding batter; do whatever is easiest.: As the oven warms to 400 F , you will notice the house slowly fill with a warm, anticipatory warmth that helps with oven spring once the muffins go in. Greasing and lightly flouring the muffin pan creates a thin barrier so the edges release cleanly, and the floured spray often gives a slightly crisper rim which I enjoy. If the pan is cold or unevenly greased you may find the muffins stick, so take an extra moment to coat each cavity thoroughly. A common mistake at this stage is skipping the flour step, which can cause tearing when you remove the muffins, so check each cup before filling.
In a large bowl, add the first 6 ingredients, through optional salt, and whisk to combine; set bowl aside.: You will see the all purpose flour , cornmeal , granulated sugar , baking powder , cinnamon , and pinch of salt form a uniform pale mixture. Whisking not only blends flavors but also aerates the dry mix, helping the baking powder distribute evenly so rise is consistent. The texture should be powdery with no lumps of sugar or baking powder. If you skip thorough mixing, pockets of leavening can create uneven domes or bitter bursts of baking powder flavor.
In a medium microwave-safe bowl, add the butter and heat to melt, about 1 minute on high power. Allow butter to cool momentarily so you don’t scramble the eggs.: When the butter melts it will shine and smell rich, and allowing it to cool for a minute or two prevents it from cooking the eggs when combined. Hot butter can cause the mixture to separate or create small cooked bits of egg, which alters texture. Stir the melted fat so it looks smooth and glossy. A typical trap here is adding eggs to piping hot butter, which results in scrambled flecks that affect mouthfeel, so wait until the butter is warm rather than hot.
Add remaining ingredients to butter and whisk to combine and until smooth and no white streaks remain.: Adding milk , eggs , honey , coconut oil , and sour cream to the cooled butter creates a silky, cohesive wet mixture. Whisk until the surface shows an even sheen and any white ribbons from the sour cream or eggs are gone. You should smell the honey lift through the mixture, and the batter will look glossy and ribbon like. If the mixture looks curdled or grainy, it likely got too hot when combined; letting the butter cool more before adding will fix this.
Pour wet mixture over dry ingredients and fold until combined; don’t overmix.: After the wet meets the dry, use a spatula to fold gently just until streaks disappear. The batter should be slightly thick with a few small lumps, not perfectly smooth. Overmixing develops flour proteins and yields a tougher muffin with tunnels, so stop as soon as the dry ingredients are incorporated. You should hear a soft scraping sound and see the batter move in broad folds. A frequent error is stirring vigorously until completely smooth, which sacrifices tenderness for uniformity.
Using a large cookie scoop, 1/4-cup measure, or spoon, fill each muffin cavity to a solid 3/4-full. Any less and you won’t get a domed top.: Filling to a steady three quarters full is the trick for domed tops and even baking. Visually, you want the batter to come close to the rim but not overflow, and the batter should hold its shape when scooped. If cavities are underfilled the muffins will be flat and denser. A common slip is inconsistent scooping, which produces uneven sizes and variable baking times, so try to measure each cup similarly for uniform results.
Add a generous pinch of cornmeal to the top of each muffin and loaf.: Sprinkling a little extra cornmeal on the tops gives a rustic texture and a hint of crunch against the soft crumb. It also signals visually that these are cornbread based, and the granules caramelize slightly in the oven for small, pleasant bursts. Pressing too much cornmeal can dry the surface, so just a generous pinch is enough. If you skip this, the muffins will still be delicious, but the top will be less textured.
Bake at 400 F for 10 minutes.: This initial high temperature jumpstarts oven spring and helps create a nicely rounded, golden top. As you watch through the oven window you will notice the edges begin to set and a light browning appear. The high heat helps the exterior form quickly which supports a domed, tender interior. A common mistake is opening the oven too often during this stage, which drops the temperature and can flatten the rise.
Reduce oven temp to 350 F and bake muffins for about 5 to 7 minutes (about 15 to 17 minutes total), or until tops are domed, puffed, and a toothpick inserted in the center comes out clean, or with a few moist crumbs dangling, but no batter. Mini loaf will take approximately 2 minutes longer than muffins. Be very careful not to overbake or cornbread will be dry.: Lowering to 350 F finishes the bake without drying the crumb, letting the interior set slowly while the exterior stays golden. Look for domed, springy tops and a toothpick that comes out with only moist crumbs. Overbaking is easy to do, and a dry mouthfeel is the usual result, so err slightly under rather than over. If the tops crack deeply or the edges look overly dark, your oven may run hot and you should reduce temperature slightly next time.
Allow muffins and loaf to cool in pan for about 10 minutes before carefully removing.: Cooling in the pan for around ten minutes lets the crumb stabilize so the muffins release cleanly. You will notice steam easing off the tops and a firming at the edges that tells you they are ready to transfer. If you try to remove them while too hot they can break or crumble. A typical misstep is impatiently plucking them out immediately, which often causes tearing and lost crumbs.
Optionally, drizzle with honey and add a pat of butter before serving.: A final drizzle of warm honey and a dab of butter make these muffins indulgently glossy and add a sweet sticky finish that contrasts the grainy cornmeal . The aroma becomes more floral and inviting, and the bite is a lovely combination of crisp, soft, and sweet. If you add too much topping right away, it can pool on the plate, so a light hand achieves the best balance.