Cadbury Egg Brownie Cups

Name: Cadbury Egg Brownie Cups
Prep time: 15 min
Cook time: 15 min
Total time: 30 min
Cuisine: American
Ingredients: 113 grams unsalted butter (1/2 cup); 210 grams caster sugar (1 cup); 55 grams cocoa powder (1/2 cup); 1 teaspoon fine sea salt; 2 eggs; 1/2 teaspoon vanilla extract; 115 grams all-purpose flour (3/4 cup + 1 tablespoon); 1 teaspoon baking powder; 1 tablespoon vegetable oil; 100 grams chopped dark chocolate (3/4 cup); Butter or cooking spray, for greasing tin; 60 grams unsalted butter, softened (4 tablespoons); 80 grams liquid glucose* (4 tablespoons); 1/2 teaspoon vanilla bean paste; 1/4 teaspoon salt; 115 grams confectioner’s sugar (1 cup), plus more to adjust consistency; Yellow gel food coloring (optional)