Sift the flour, baking powder, salt and sugar into a large mixing bowl.
Pour in 30 grams (1 ounce) of cooled melted butter and the beer, use a wooden spoon to stir about 20 times until just combined.
Spoon the batter into the loaf pan. Use the back of a spoon to smooth the top.
Drizzle the remaining butter over the top of the bread.
Place in the oven and bake for 40 – 50 minutes or until a skewer inserted into the top of the bread comes out clean.
Remove from the oven. Let the bread stand in the pan for 5 minutes, then turn out onto a wire rack and allow to cool completely before cutting.
Store in and airtight container at room temperature.