Vegan Yule Log

For the cake:

• 200 g self-raising flour
• 1 Tablespoon unsweetened cocoa powder
• ¼ Teaspoon baking soda (bicarbonate of soda)
• ⅛ Teaspoon xanthan gum (it's very important to measure this accurately so I recommend using a measuring spoon if you can)
• 115 g caster/superfine sugar
• 75 g Dairy-free margarine, melted after weighing
• 250 ml unsweetened soy milk
• 2 Teaspoons vanilla extract

For the vanilla buttercream filling:

• 80 g vegan margarine or butter
• 200 g icing/powdered sugar
• 1 Tablespoon soy milk
• 2 Teaspoons vanilla extract

For the chocolate ganache*:

• 300 g Semi-sweet chocolate** (use one with ~45% cocoa content)
• 120 ml unsweetened soy milk