Banana-Chocolate Chip Cake with Peanut Butter Frosting

INGREDIENTS

• 1 1/2 cups sugar
• 2 teaspoons baking soda
• 2 cups mashed very ripe bananas
• 3 cups all-purpose flour
• 1/2 cup (packed) light brown sugar
• 2 cups creamy peanut butter
• Chocolate chips, mini chocolate chips, and chocolate kisses
• 1 1/2 teaspoons vanilla extract
• 1 cup (2 sticks) unsalted butter, room temperature
• 2 1/2 teaspoons vanilla extract
• 1 10-ounce bag mini chocolate chips
• 1 1/2 cups powdered sugar
• 1 cup sour cream
• 2 teaspoons kosher salt
• 3 large eggs
• Nonstick vegetable oil spray