Reduced-Fat German Chocolate Cake | America's Test Kitchen

Ingredients

• 3 ounces (85 grams) milk chocolate, chopped
• 3 tablespoons Dutch-processed cocoa powder
• 1/3 cup boiling water
• 1 1/3 cups (6⅔ ounces/189 grams) all-purpose flour
• 1/2 teaspoon baking soda
• 3 tablespoons unsalted butter, softened
• 1/2 cup packed (3½ ounces/99 grams) brown sugar
• 1/3 cup (2⅓ ounces/66 grams) granulated sugar
• 1/2 teaspoon salt
• 3 large eggs, room temperature
• 1 teaspoon vanilla extract
• 1/2 cup low-fat sour cream, room temperature
• 1 cup fat-free evaporated milk
• 3 tablespoons cornstarch
• 2 tablespoons unsalted butter
• 2/3 cup packed (4⅔ ounces/132 grams) packed brown sugar
• 1/4 teaspoon salt
• 1 tablespoon vanilla extract
• 1/3 cup pecans, toasted (see note) and chopped fine
• 1/2 cup (1½ ounces/43 grams) sweetened shredded coconut, toasted