Soak the Fruit: Place the raisins and sultanas/currants in a bowl and pour over the strong black tea. Let the dried fruit soak for at least 2 hours or overnight for maximum flavor absorption.
Preheat the Oven: Preheat your oven to 350°F (175°C) and grease a loaf pan.
Mix the Dry Ingredients: In a large mixing bowl, combine the flour, baking powder, brown sugar, cinnamon, nutmeg, and allspice.
Combine Everything: Add the soaked fruit (including any leftover tea) and the egg to the dry ingredients. Stir until just combined, forming a thick batter.
Bake the Barmbrack: Pour the batter into the prepared loaf pan, smoothing the top. Bake for about 1 hour or until a skewer inserted into the center comes out clean.
Cool and Serve: Allow the barmbrack to cool in the pan for a few minutes before transferring it to a wire rack. Slice and serve with butter and a hot cup of tea.
Optional Tradition: If you’d like to include charms in your barmbrack, wrap them securely in parchment paper and mix them into the batter before baking. Just be sure to warn guests about them!