Nutella Swirl Espresso Banana Bread

Name: Nutella Swirl Espresso Banana Bread
Prep time: 20 min
Cook time: 1 h 15 min
Total time: 1 h 35 min
Cuisine: American
Ingredients: 1/2 cup +1 tbsp (127 g) unsalted butter (divided); 3/4 tsp (1.5 g) espresso powder; 1/2 cup (100 g) granulated sugar; 1/2 cup (110 g) light brown sugar; 2-3 (240 g) very ripe bananas ((about 1 cup), mashed); 2 large eggs, (room temperature); 1/3 cup (55 mL) neutral oil (canola or vegetable); 1/3 cup (80 mL) buttermilk, (room temperature); 1/4 cup (60 g) sour cream, (room temperature); 1 1/2 tsp (6 mL) vanilla extract; 1 3/4 cups (220 g) all purpose flour; 1 tsp (5 g) baking soda; 1/2 tsp (2 g) baking powder; 1/2 tsp (3 g) salt; 1/2 cup (150 g) nutella; 5 oz (140 g) cream cheese (softened); 4 tbsp (56 g) unsalted butter (softened); 1/3-1/4 cup (40 -60) powdered sugar, (to taste preference); 1/2 tsp (3 g) vanilla bean paste ((vanilla extract also works)); 3/4 tsp (2 g) espresso powder; 1/2 tbsp (8 mL) milk, your choice (( I use unsweetened coconut coffee creamer, but milk or cream works!))