Preheat oven to 400°F and line a 1-pound loaf pan with parchment paper.

In a small pot, add the butter and molasses and put over low heat until melted completely.

In a small bowl, whisk together sourdough discard, Guinness, and buttermilk until no traces of discard remain.

In a separate bowl, add the whole wheat flour, oats, flour baking soda, and sea salt and whisk together

Make a well in the center of the flour mixture and pour the butter mixture and Guinness mixture in.

Stir the ingredients together until no dry bits of flour remain, make sure you scrape the bottom. Don’t overmix. The mixture should look more like a cake batter than a dough.

Pour the batter into the prepared pan. Using a butter knife or paring knife, make a deep, vertical slice through the center of the loaf.

Bake at 400°F for 30 minutes. Then without opening the oven door, turn the heat down to 350°F and continue baking for another 15 to 20 minutes or until the center of the loaf has set and registers at least 200°F when probed with an instant-read thermometer.