Step 1

Mixing

Step 2

Put the raisins in a bowl, cover with water, and set aside to soak for at least an hour.

Step 3

In the bowl of a stand mixer, combine the bread flour, rye flour, and rouge de bordeaux flour. You can mix with a silicone spatula or dough scraper if you don't have a stand mixer.

Step 4

In different bowl, scald the corn flour with the hot coffee, then add the molasses, cocoa powder, and salt to dissolve them and also to help cool the scald.

Step 5

When the scald is under 90F, pour it into the flours. Add the sourdough starter and thoroughly mix. The dough will be sticky but over time it will strengthen a bit. See photos in the gallery.

Step 6

Cover and let the dough rest about 30 minutes.

Step 7

Thoroughly drain the raisins, then mix them into the dough.

Step 8

Bulk Fermentation

Step 9

Transfer the dough to a lightly oiled bucket or straighwalled container and note the level. Cover and let the dough rest 30 minutes. Do two rounds of stretching and folding on the dough separated by a 30-minute rest.

Step 10

When the dough has expanded by about 40%, it is ready to shape. This dough doesn't ferment very quickly, so plan for 8-12 hours from when you mixed it, depending on the ambient temperature.

Step 11

Shaping and Final Proof

Step 12

Flour your work surface and scrape the dough out onto it. Shape the dough using a bench knife and more flour as needed to deal with the stickiness. Place it seam-side up in a floured proofing basket.

Step 13

Cover and let rise again for about an hour at room temperature, then refrigerate overnight (8-16 hours). Leave it at room temperature longer if the ambient temp is cool. You can also bake the dough the same day if you proof for 2+ hours or longer at room temperature. Because of the heavy raisins in the dough, it will not expand as much in the basket as you may be used to.

Step 14

Baking

Step 15

Preheat your oven and baking vessel to 500F for 30 minutes.

Step 16

Flip the dough out of the proofing basket and onto a sheet of parchment paper. Score the dough and brush it with water if you want a dark, less floured crust.

Step 17

Placed the dough in the baking vessel and bake at:

Step 18

500°F for 20 minutes, lid on

Step 19

425°F for 15 minutes, lid on

Step 20

425°F for 15 minutes, lid off

Step 21

When baking is complete, the bread should have an internal temperature over 205F.

Step 22

Let the bread cool for a couple of hours before you slice it.