Substances:

For the Cake:

• 1/2 cup (1 stick) unsalted butter, softened
• 1 cup granulated sugar
• 2 massive eggs
• 1 cup bitter cream
• 1 teaspoon pure vanilla extract
• 2 cups all-purpose flour
• 1 teaspoon baking powder
• 1 teaspoon baking soda
• 1/4 teaspoon salt

For the Cinnamon-Sugar Filling:

• 1/2 cup brown sugar, packed
• 1 1/2 teaspoons floor cinnamon
• 1/2 cup chopped nuts (e.g., walnuts or pecans), elective

For the Streusel Topping:

• 1/4 cup all-purpose flour
• 1/4 cup granulated sugar
• 2 tablespoons unsalted butter, softened
• 1/2 teaspoon floor cinnamon

Directions:

1. Preheat your oven to 350°F (175°C). Grease and flour a 9×9-inch sq. baking pan.
2. In a mixing bowl, cream collectively the softened butter and granulated sugar till mild and fluffy.
3. Beat within the eggs, separately, and stir within the bitter cream and vanilla extract till properly mixed.
4. In a separate bowl, whisk collectively the flour, baking powder, baking soda, and salt.
5. Progressively add the dry elements to the moist elements, mixing till simply mixed.
6. In a small bowl, put together the cinnamon-sugar filling by mixing the brown sugar and floor cinnamon. When you’re utilizing nuts, stir them into the filling combination.
7. Unfold half of the cake batter into the ready pan. Sprinkle half of the cinnamon-sugar filling over the batter.
8. Rigorously unfold the remaining batter over the cinnamon-sugar layer. It is okay if it’s kind of difficult; the aim is to create a swirl.
9. For the streusel topping, mix the flour, granulated sugar, softened butter, and floor cinnamon in a small bowl. Use your fingers or a fork to make a crumbly combination.
10. Sprinkle the streusel topping evenly over the cake batter.
11. Bake the cake within the preheated oven for about 35-40 minutes or till a toothpick inserted into the middle comes out clear.
12. Enable the espresso cake to chill within the pan for about 10-Quarter-hour earlier than transferring it to a wire rack to chill utterly.
13. As soon as cooled, slice and serve. Take pleasure in your Sour Cream Coffee Cake!

This espresso cake is ideal for breakfast or brunch, particularly when paired with a sizzling cup of espresso.