Banana Cupcakes with Chocolate Peanut Butter Frosting

Name: Banana Cupcakes with Chocolate Peanut Butter Frosting
Prep time: 30 min
Cook time: 18 min
Total time: 48 min
Cuisine: American
Ingredients: 1/2 cup (8 Tbsp; 113g) unsalted butter, softened to room temperature; 1/2 cup (100g) packed light or dark brown sugar; 3/4 cup (150g) granulated sugar; 3 large eggs, at room temperature; 1 and 1/2 cups (345g) mashed bananas (about 4 medium or 3 large ripe bananas); 2 teaspoons pure vanilla extract; 2 cups (250g) all-purpose flour (spooned & leveled); 1 teaspoon baking soda; 1/2 teaspoon ground cinnamon; 1 teaspoon salt; 1/2 cup (120ml) buttermilk*; 1 cup (180g) mini or regular semi-sweet chocolate chips; 1 and 3/4 cups (210g) confectioners’ sugar; 1/4 cup (21g) unsweetened cocoa powder; 2 Tablespoons (30ml) heavy cream or half-and-half*; 1 teaspoon pure vanilla extract; salt, to taste; 3/4 cup (185g) creamy peanut butter; 1/4 cup (4 Tbsp; 56g) unsalted butter, softened to room temperature; 3/4 cup (90g) confectioners’ sugar; 3 Tablespoons (45ml) heavy cream or half-and-half*