Chocolate Babka

• Filling:
• 3 ounces bittersweet chocolate, finely grated
• 1/4 cup granulated sugar
• 1 1/2 teaspoons unsweetened cocoa
• 1/4 teaspoon ground cinnamon
• Streusel:
• 2 tablespoons powdered sugar
• 2 tablespoons white rice flour
• 1/8 teaspoon salt
• 1 tablespoon unsalted butter, softened
• Dough:
• 1 package dry yeast (about 2 1/4 teaspoons)
• 5 tablespoons granulated sugar, divided
• 1 1/2 cups warm 1% low-fat milk (100u0b0 to 110u0b0)
• 2 tablespoons unsalted butter, melted
• 1 tablespoon canola oil
• 1/2 teaspoon vanilla extract
• 1 large egg
• 1 large egg yolk
• 4.2 ounces sweet white sorghum flour (about 1 cup)
• 4.2 ounces tapioca flour (about 1 cup)
• 2.6 ounces potato starch (about 1/2 cup)
• 2.3 ounces cornstarch (about 1/2 cup)
• 1 tablespoon xanthan gum
• 2 teaspoons baking powder
• 1/2 teaspoon salt
• Cooking spray

1. To prepare filling, combine first 4 ingredients in a bowl, stirring with a whisk.
2. To prepare streusel, combine 1 tablespoon filling, powdered sugar, white rice flour, and 1/8 teaspoon salt in a small bowl; cut in 1 tablespoon butter with a pastry blender or 2 knives until mixture resembles coarse meal. Cover and refrigerate.
3. To prepare dough, dissolve yeast and 1 tablespoon granulated sugar in milk in a bowl; let stand 5 minutes.
4. Combine melted butter, oil, vanilla, egg, and egg yolk in a medium bowl; stir with a whisk. Weigh or lightly spoon flours, potato starch, and cornstarch into dry measuring cups; level with a knife. Combine flours, potato starch, cornstarch, 4 tablespoons sugar, xanthan gum, baking powder, and 1/2 teaspoon salt in a large bowl; beat with a mixer at medium speed. Add yeast mixture and egg mixture; beat at low speed until blended. Add 1/3 cup streusel; beat just until blended.
5. Spoon one-third of dough evenly into bottom of a 9 x 5-inch loaf pan coated with cooking spray. Top with half of filling. Repeat procedure ending with dough. Swirl dough together using the tip of a knife. Cover with plastic wrap coated with cooking spray, and let rise in a warm place (85u0b0), free from drafts, 1 hour or until dough reaches top of pan.
6. Preheat oven to 350u0b0.
7. Sprinkle top of dough with streusel. Bake at 350u0b0 for 45 minutes or until browned or loaf sounds hollow when tapped. Cool 15 minutes in pan on a wire rack; remove from pan. Cool completely.

filling, bittersweet chocolate, granulated sugar, unsweetened cocoa, ground cinnamon, streusel, powdered sugar, white rice flour, salt, unsalted butter, yeast, sugar, milk, unsalted butter, canola oil, vanilla, egg, egg yolk, sweet white sorghum flour, tapioca flour, starch, cornstarch, xanthan gum, baking powder, salt, cooking spray

Taken from www.myrecipes.com/recipe/chocolate-babka-0 (may not work)