Preheat the oven to 425°F. In a mixing bowl, combine both the all-purpose and whole wheat flours, wheat germ, baking soda, and salt. Stir together. In a separate bowl, whisk together the buttermilk, molasses, and melted butter. Add the buttermilk mixture and stir until combined.
Turn the dough out onto a lightly floured counter. Bring the dough together and knead just a couple of times to make a smooth ball. Do not over knead the dough. Shape into a ball and pat out into a 7-inch circle.
Lightly flour a baking sheet. Transfer the dough to the baking sheet and dust the top with more flour. Use a sharp knife to score a cross into the top of the dough, cutting about ½ inch deep. Bake the bread for 15 minutes and then reduce the heat to 375°F. Continue baking for another 30 to 35 minutes until fully baked. The bread will sound hollow when knocked on the bottom.
After baking, wrap the soda bread in a tea towel to cool. The steam will help to soften the outside crust of the bread. Enjoy!
Notes
*As a substitute, add 2 teaspoon lemon juice or white vinegar to 1 ½ cups milk. Let sit for 5 minutes and then use instructed.