Triple Chocolate Muffins

Bahan-bahan (10 porsi)

• one 4-ounce bar (113g) semi-sweet chocolate*
• 1/2 cup (8 Tbsp; 113g) unsalted butter
• 3/4 cup (150g) granulated sugar
• 2 large eggs, at room temperature
• 1 teaspoon pure vanilla extract
• 1/3 cup (80g) sour cream or plain yogurt, at room temperature
• 1/2 cup (63g) all-purpose flour (spooned & leveled)
• 1/3 cup (27g) unsweetened natural cocoa powder*
• 1/2 teaspoon baking soda
• 1/4 teaspoon salt
• 1 heaping cup (180-200g) semi-sweet or dark chocolate chips (mini size works too!)