Low FODMAP Souche de Noël - a Twist on Bûche de Noël - FODMAP Everyday

Ingredients

• 1 batch Chocolate Ganache
• 1 1/3 cups (194 g) low FODMAP, gluten-free all-purpose flour, such as Bob’s Red Mill Gluten-Free 1 to 1 Baking Flour
• 1 cup (90 g) confectioners’ sugar
• 1/2 cup (43 g) sifted Dutch-processed cocoa, plus extra
• 1 teaspoon baking powder
• 1 teaspoon salt
• 8 large eggs, (at room temperature)
• 1 cup (198 g) sugar
• 1 teaspoon vanilla extract
• 1, 8-egg batch Italian Meringue Buttercream
• 1 tablespoon instant espresso powder
• 1 tablespoon vanilla extract
• 8 Meringue Mushrooms
• 3 tablespoons very finely chopped walnuts
• Powdered green food coloring
• Wilton Sprinkles Jumbo Rainbow Nonpareils