3 cups flour
1 tbsp baking powder
3 tbsp sugar
1 tsp salt
1 can (355ml) dark beer, at room temperature (Bass, Newcastle, Guiness, etc)
1/4 cup unsalted butter, melted
Preheat the oven to 375F/190C. In a mixing bowl, combine all the dry ingredients. Add the beer all at once, mixing as little as possible; the batter should be lumpy.
Grease a 9x5x3-inch loaf pan with half the butter. Pour the batter into a and brush with the rest of melted butter. Sprinkle top with kosher salt.
Bake in the oven for 35 to 40 minutes, or until an inserted skewer comes out clean. Turn out onto a rack to cool.