Chocolate Pear Cake with Hazelnut Crumb Topping

Name: Chocolate Pear Cake with Hazelnut Crumb Topping
Prep time: 15 min
Cook time: 35 min
Total time: 50 min
Cuisine: American
Ingredients: 1 1/3 cup all purpose flour, 170g; 1/4 cup unsweetened cocoa powder, 30g; 2 tsp baking powder; 1/2 tsp salt; 1/2 cup brown sugar, 110g; 1/3 cup + 2 tbsp granulated sugar, 90g; 2 large eggs; 1/2 cup canola oil, 120g; 1/2 cup ricotta, or sour cream, Greek yogurt. 125g; 6 tbsp milk; 1 tsp vanilla extract; 3 small pears, peeled, cored and sliced; 4 tbsp cold butter, cubed; 1/2 cup all purpose flour, 60g; 1/4 cup granulated sugar, 50g; 2 oz finely chopped hazelnuts, 50g