- Our Black Walnut Brazilian coffee is a delightful, naturally flavored, low-acidity Brazilian coffee blended with Black Walnut Leaf, Walnuts and Rose Petals. You will really enjoy the Black Walnut flavor and the soft, low-acid Brazilian coffee taste! - Ingredients: Brazilian coffee (whole coffee beans), Black Walnut Leaf, Walnuts, Rose Petals and Natural Black Walnut Flavor.