Brownie Sandwich with Peanut Butter Mascarpone and Honeycomb 350 g Dark Chocolate 200 g Salted Butter, cubed 200 g Caster Sugar 3 Eggs, lightly beaten 1 tsp Vanilla Essence 2 tbsp Strong Black Coffee (optional) 100 g Self-raising Flour 125 g Walnuts, roughly chopped 75 g White Chocolate (roughly chopped) 75 g Milk Chocolate (roughly chopped) Preheat the oven to 180C. Line a 28 x 18 x 2.5cm tin with…