How to Make It
Preheat the oven to 375°. Coat a 10-by-5-inch loaf pan with nonstick baking spray. In a medium skillet, cook the bacon over moderate heat, stirring occasionally, until browned and crisp, about 14 minutes. Using a slotted spoon, transfer to a paper towel–lined plate to drain.
In a large bowl, whisk the flour with the baking powder, sugar, salt and pepper. Make a well in the dry ingredients. Add the beer and 3 tablespoons of the melted butter. Using a rubber spatula, stir until only a few streaks of flour remain. Fold in the bacon, cheese and scallions until just combined. Scrape the batter into the prepared loaf pan and smooth the top. Pour the remaining 1 tablespoon of melted butter over the top.
Bake for about 1 hour, until a toothpick inserted into the center of the loaf comes out clean. Transfer the pan to a rack and let cool for 15 minutes. Carefully remove the bread from the loaf pan and let cool completely on the rack before slicing. Serve with softened butter for spreading.