Chocolate Buttermilk Cake with Chocolate Cream Cheese Frosting and Honey Caramel Corn

Ingredients

• 225g unsalted butter
• 100g unsalted butter, at room temperature
• 1 tsp vanilla extract
• ½ tsp salt
• 1 tsp vanilla bean paste
• 150g water
• 1 large egg, at room temperature
• 150g honey
• 235g dark brown sugar
• 250g cream cheese, at room temperature
• 250g all-purpose flour
• 1 tsp baking soda, sifted
• 300g caster sugar (regular sugar if you are in the US is fine, it is finer in the states than Australia / NZ)
• 125g unsalted butter, melted and cooled
• 50g Dutch-process cocoa powder, sifted
• 125g buttermilk, at room temperature
• 100g powdered sugar / icing sugar, sifted
• 10 cups freshly popped popcorn (from about ½ cup plus 2 Tbsp kernels)
• ½ tsp baking soda, sifted