Prep: Preheat oven to 400 F and line a 9 by 4 inch pan with parchment.
Melt butter: Heat up butter and molasses in small saucepan until melted.
56 grams unsalted butter, 42 grams molasses
Make the batter: Whisk together, oats, whole wheat flour, all-purpose flour, baking soda, salt and cane sugar.
90 grams old-fashioned oats, 210 grams whole wheat flour, 60 grams all-purpose flour, 1 teaspoon baking soda, 1 teaspoon salt, 50 grams cane sugar
Whisk together sourdough discard, Guinness and buttermilk until no traces of discard remain.
113 grams sourdough discard, 334 grams Guinness, 56 grams buttermilk
Make a well in the center and pour 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.
Bake: 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.
Top with more oats.
Bake at 400 F for 30 minutes, 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.
Serve: Transfer the loaf to a wire rack, it’s best to let this bread set and cool overnight before slicing.