PREPARATION:
STEP 1: MAKE THE DOUGH
Preheat your oven to 425°F/204°C with your Challenger Bread Pan® inside. Whisk together 240g whole-wheat flour, 140g all-purpose flour, 12g sugar, 7g baking soda, 7g wheat germ (if using), and 4g salt, set aside until ready to use. Place a sheet of Pre-Cut Parchment on the side of your work space to use during step 3.
STEP 2: MAKE THE RYE SCALD
Place 40g rye flour in a large bowl and cover with 80g boiling water. Stir mixture together with a rubber spatula until a thick paste forms. Transfer paste to the bowl of a blender along with 363g buttermilk and 15g vegetable oil. Blend on medium-low speed until uniform, then transfer the mixture back to the bowl.
STEP 3: MAKE THE BATTER
Using a dough whisk or rubber spatula, stir the dry ingredients into the buttermilk mixture until just combined and no dry flour remains. Using a flexible dough scraper or rubber spatula, form the dough into a round ball at the bottom of the bowl, then transfer it to the center of the parchment. Using lightly-moistened hands, gently round and smooth the dough into an even, tall 10-inch wide round (do not press down on the dough). Using the moistened edge of a scraper, gently score a 1/2-inch-deep cross into the top of the loaf.
STEP 4: BAKE
Transfer the loaf on the parchment to the Challenger Bread Pan and cover it with the lid. Reduce oven temperature to 400°F/205°C. Bake soda bread, covered, until golden brown, about 30 minutes. Remove lid and continue to bake for an additional 5 minutes.
Remove loaf from your Bread Pan and allow to cool for 30 minutes before slicing and serving.
Enjoy warm with salted butter and marmalade, or salted butter and a bowl of soup. This soda bread is best consumed on the day it is made, though it will toast up nicely for up to 3 days.