Valentine's cake: Red velvet cake from the Big Green Egg

Ingredients

• 1 vanilla pod
• 170 g butter, at room temperature, plus extra to grease
• 385 g sugar
• 3 eggs (size L)
• 330 ml buttermilk, at room temperature
• 400 g flour + extra for dusting
• 25g cocoa powder
• 1½ tbsp baking powder
• 1 tbsp vinegar
• Red food colouring
• 250 g butter, at room temperature
• 200 g icing sugar
• 400 g cream cheese, at room temperature
• Edible roses and/or decoration of your choice, such as rose water crackers