Melt the butter in a small bowl and let cool to room temperature.: The aroma of melting butter is rich and nutty, and allowing it to cool slightly prevents the eggs and yogurt from curdling when mixed. You will notice a glossy shimmer as the butter melts, with a faint nutty scent if cooked gently. The reason this matters is that very hot fat can scramble proteins in the wet ingredients, so cooling ensures a smooth batter. A common mistake is using butter that is still too hot, which can cause separation or a grainy texture. If that happens, let the mixture rest a bit longer until it is merely warm to the touch.
In a medium bowl, whisk together the yogurt, milk, honey, and eggs, until smoothly combined.: As you whisk, the mixture will become silky and slightly aerated, with the honey dissolving and the eggs blending into a uniform pale batter. This smoothness helps with even distribution into the dry mix, so it is worth taking a minute. The whisk will leave faint ribbons that settle quickly, indicating good integration. If you skip adequate whisking, you may end up with streaks of unmixed ingredients, which can create pockets of uneven texture in the final cornbread.
In a large mixing bowl, combine the cornmeal, flour, sugar, baking powder, baking soda, and salt.: When you stir these dry ingredients you will see the grainy cornmeal and the fine flour come together into a uniform pale mixture. Breaking up lumps now prevents dense spots after baking. The dry aroma is slightly toasty from the cornmeal , and sifting or whisking helps distribute the leavening evenly. A common error is under mixing the dry ingredients, which can cause uneven rising, so give them a thorough stir.
Pour the wet ingredients into the dry ingredients and stir gently, just until you only have a few streaks of flour remaining. Pour in 7 tablespoons of the butter (reserve the remaining tablespoon for the skillet—you can eyeball it). Fold gently, just until combined. Let the batter rest while you preheat the oven (the resting time will make your cornbread even more tender! You can also refrigerate it overnight at this point; let come to room temperature prior to baking).: At this stage the batter should look rustic and slightly lumpy, not overly worked. The cornmeal will lend a grainy, sun colored texture and the batter will thicken as you fold. Resting allows the dry ingredients to hydrate so the crumb becomes tender and consistent; you will notice the batter mellow and become slightly more cohesive after sitting. If you overmix, gluten development from the flour can make the cornbread tough, so folding just to combine is essential. One slip is stirring until perfectly smooth, which kills the lightness, so avoid that temptation. Refrigerating overnight is handy and can deepen flavor, but be sure to bring it back to room temperature before baking for even oven performance.
Place a rack in the center of your oven. Place a 10-inch cast iron skillet on the rack and preheat the oven to 425°F with the skillet in it.: Heating the skillet until it is screaming hot is what forms the crisp, caramelized edges that are the hallmark of Skillet Cornbread . You will hear a faint hum as the oven reaches temperature, and the cast iron will radiate retained heat. The very hot pan meets the batter and starts cooking the exterior immediately upon contact, which helps produce that golden crust. A typical misstep is not preheating the skillet, which leads to a pale, soft edge instead of the desired crispness. Use oven mitts and a sturdy surface when handling the heated skillet.
Very carefully remove the hot skillet from the oven. Reduce oven temperature to 375°F. Coat the bottom and sides of the hot skillet with the remaining 1 tablespoon butter.: The moment you pour melted butter into the hot pan you will see it sizzle and spread, forming a glossy pool that smells fragrant and toasty. Coating the sides helps the batter release and ensures a buttery crust. Reducing the oven temperature prevents over browning while still allowing a thorough bake. One common mistake is splashing cool batter into a too hot skillet and creating steam pockets, so pour steadily and cautiously to avoid spatters.
Carefully pour the batter into the buttered skillet and transfer the skillet back to the center rack. Bake until the center of the cornbread is firm to the touch and a toothpick inserted in its center comes out clean, 22 to 25 minutes. Let cool 10 or so minutes, then slice and serve right from the skillet with additional butter and honey.: As the batter hits the hot butter , you may hear a soft hiss, and the edges will begin to bubble and brown in the oven. The aroma will intensify, filling your kitchen with a warm, toasty scent that hints at caramelized sugars and roasted corn. Visual cues matter here the top should be golden and slightly domed, and a gentle press in the center should feel set. Removing it too early yields a gummy interior, and leaving it too long risks dryness, so watch for that clean toothpick test. Letting it rest allows the crumb to finish setting, and slicing after a brief cool down gives neat wedges that hold together for serving.