In a small bowl, whisk together the buttermilk and egg.
1 ½ cups buttermilk, 1 egg
Pour the buttermilk mixture into the dry ingredients and mix with a spoon into a dough.
Form the dough into a round-ish loaf, then cut an 'X' with a serrated knife about 1 inch deep into the loaf.
Line the slow cooker with parchment paper and lower the loaf onto the parchment. Drape paper towels over the top of the crock, cover, and cook on high for 2 1/12 to 3 hours.
Notes
For a more even crust you can flip the bread over for the last 20-30 minutes of cook time. The bread will be a little flatter on top if you do this but will have a nice thin crust.
If you don’t have buttermilk, you can add 1-2 tablespoons of white vinegar or freshly squeezed lemon to the measuring cup then add milk to measuring cup to equal 1 ½ cups. Stir well and let sit for 5 minutes prior to using in recipe.
To reheat, wrap in foil and place in the oven at 350 degrees F for about 15 minutes.