No this will be my first time. Our brew club is having SMASH contest. Only rules are: Must use Mosaic, Maris Otter. Can be in any amounts, can use any yeast. I was wanting to submit something different. Thought, what about kettle souring it. Could not find anything on kettle souring a SMASH.

Want to try something new. Do you think it will taste good?

Thank you for your advice on the Carafa. I will try bumping it down to 5% and raising the Chocolate malt to 5%.

https://www.brewersfriend.com/homebrew/recipe/view/564703/ginger-devil-holiday-spice-stout Experimenting here. Feedback very welcome.