PREP OVEN AND PAN: Preheat the oven to 350°F. Grease a 9 x 5-inch loaf pan with butter or nonstick spray.
MIX DRY INGREDIENTS: In a large mixing bowl, whisk together 3 cups self-rising flour and 3 tablespoons granulated sugar until evenly combined.
ADD BEER: Pour the entire 12-ounce bottle of beer into the center of the flour mixture. Stir with a wooden spoon just until combined. The batter will be thick and slightly lumpy. Do not overmix.
FILL PAN: Spoon the batter into the prepared loaf pan and spread evenly.
ADD BUTTER: Drizzle 3 tablespoons melted salted butter evenly over the top of the batter.
BAKE: Bake for 50 to 60 minutes, until the top is golden brown and a toothpick inserted in the center comes out clean. The loaf should sound hollow when lightly tapped.
COOL: Let the bread cool in the pan for 5 minutes, then transfer to a wire rack. Allow to cool before slicing for clean cuts.
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Notes
Flour Substitute: If using all-purpose flour, combine 3 cups all-purpose flour with 1 tablespoon baking powder and ¾ teaspoon kosher salt to replace self-rising flour.Butter Tip: If using unsalted butter, add ¼ teaspoon kosher salt to the flour mixture.Beer Options: Non-alcoholic beer, lemon-lime soda, or ginger ale can be substituted, but traditional beer provides the richest flavor.Storage: Store in an airtight container at room temperature for up to 3 days.Freezing: Slice first, then freeze with parchment between slices in a freezer-safe bag for up to 6 months.