→ Streusel Topping
01 -
6 tablespoons unsalted butter, cold and cut into small cubes
02 -
1/2 cup light brown sugar, packed
03 -
2/3 cup all-purpose flour
04 -
1/4 teaspoon fine sea salt
05 -
1 teaspoon ground cinnamon
06 -
3/4 cup walnuts or pecans, coarsely chopped
07 -
1/2 cup semisweet chocolate chips
→ Batter
08 -
2 cups all-purpose flour
09 -
1/3 cup light brown sugar, packed
10 -
1/2 cup granulated sugar
11 -
2 teaspoons baking powder
12 -
1/2 teaspoon baking soda
13 -
1/2 teaspoon fine sea salt
14 -
1 teaspoon instant espresso powder (optional)
15 -
1 cup full-fat sour cream, at room temperature
16 -
1/2 cup neutral oil, such as vegetable or avocado
17 -
1/4 cup whole milk, at room temperature
18 -
2 large eggs, at room temperature
19 -
2 teaspoons pure vanilla extract
20 -
1 cup semisweet chocolate chips