Mocha Crunch Donuts

Name: Mocha Crunch Donuts
Cuisine: American
Ingredients: 1/2 cup light brown sugar; 1/3 cup all-purpose flour; 1 teaspoon espresso powder; 1 teaspoon cocoa powder; 1/4 teaspoon salt; 1/4 cup salted butter, cold, cut into chunks; 1 1/2 cups all-purpose flour; 1/2 cup cocoa; 1/3 cup light brown sugar; 2 teaspoons espresso powder; 1/2 teaspoon baking powder; 1/2 teaspoon baking soda; 1/2 teaspoon salt; 1 large egg, room temperature; 1/3 cup plain yogurt (any will do); 1/3 cup milk; 1/3 cup vegetable oil; 1 teaspoon vanilla extract; 4 ounces dark chocolate; 1 teaspoon coconut oil (see instructions); 1/2 cup powdered sugar; 1 tablespoon heavy cream; 1 tablespoon coffee (can also sub 1 T heavy cream + 1/2 teaspoon espresso powder)