Ingredients
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1/4 cup unsalted butter, plus more for greasing muffin tins
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1/2 cup minced onion
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1/4 cup minced jalapeño, seeded and white membranes removed, plus 12 thin slices
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2 large eggs, lightly beaten
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1 cup buttermilk
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1 cup plain yellow cornmeal
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1/2 cup all-purpose flour
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1 teaspoon taco seasoning, or to taste
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1 teaspoon salt, or to taste
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1/2 teaspoon baking soda
Description
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Preheat oven to 375 degrees F (190 degrees C) and grease the cups of a 12-muffin tin.
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Place 1/4 cup butter in a small skillet and melt. When butter is melted, add onion and minced jalapeño and cook, stirring occasionally, 3 to 5 minutes. Set aside to cool.
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In a mixing bowl, combine beaten eggs and buttermilk, stirring briskly to combine.
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In a separate bowl, whisk together cornmeal, flour, taco seasoning, salt, and baking soda.
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When the onions and jalapeños have cooled to room temperature, combine with egg and buttermilk mixture, stirring briskly.
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Add wet ingredients to dry ingredients, stirring until dry ingredients are just moistened and there are no lumps. Pour batter evenly into prepared muffin cups. Place a slice of jalapeño on top of each muffin.
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Bake in the center of the preheated oven until browned and a toothpick inserted into the middle of the muffin comes out clean, about 25 minutes. If it does not come out clean, bake about 5 minutes more and test again.
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Cool in the pan on a rack, about 5 minutes. Serve warm.