Name: Maple Walnut Coffee Cake
Prep time: 20 min
Cook time: 35 min
Total time: 55 min
Ingredients: 1/2 cup (100 grams) light brown sugar; 1/4 cup (32 grams) all-purpose flour; 1/4 cup (27 grams) finely chopped California walnuts; 1/2 teaspoon ground cinnamon; 3 tablespoons (43 grams) unsalted butter, melted; 2 cups (254 grams) all-purpose flour; 1 teaspoon baking powder; 1/2 teaspoon baking soda; 1/2 teaspoon fine salt; 1/2 cup (100 grams) light brown sugar; 1/2 cup (54 grams) chopped California walnuts; 1/2 cup (170 grams) maple syrup; 1/2 cup (100 grams) vegetable oil; 1/4 cup whole milk; 2 large eggs, beaten; 1 teaspoon maple extract (optional); 8 ounces (227 grams) sour cream, at room temperature; 1/2 cup (63 grams) powdered sugar, sifted; 2 tablespoons maple syrup