A recipe of my own design, derived from the detmolder process and king Arthur’s recipe.
The below recipe is completed in duplicate to form the pumpernickel half and the rye half of the marble rye.
Each half total:
95g rye flour (medium/light rye or pumpernickel, depending on the half)
135g wheat flour
20g vital wheat flour
20g potato flour
10g dry milk
6.5g salt
1.5g onion powder
7g caroway seeds, roughly ground in a mortar and pestle or spice grinder
(For pumpernickel half, 16g cocoa powder)
Ferment 1:
2g rye flour
3g water
1g yeast
Ferment 2:
25g rye flour
19g water
Ferment 3:
68g rye flour
68g water
Each half of final dough:
135g wheat flour
20g vital wheat gluten
20g Potato flour
10g Dry milk
100g water, mixed with entirety of respective pre-ferment
6.5g salt
1.5g Onion powder
7g Caraway
(For pumpernickel half: 16g unsweetened black cocoa)
Process:
It is recommended to begin in the mid or early morning the day before you intend to bake. It is also reccomend to use a pair of Tupperware for the pre-ferment, but do not close them completely to prevent the buildup of pressure.
Mix the water and yeast for the first ferment before adding the rye flour for this step. Allow to ferment for 4hrs.
Mix the water for the second ferment and the product of the first ferment to form a slurry. Add the rye flour for this step and mix. Allow to ferment for 16 hours.
Mix the water for the third ferment and the product of the second ferment to form a slurry. Add the rye flour for this step and mix. Allow to ferment for 4 hours.
Mix the wheat flour, vital wheat gluten, potato flour, milk powder, salt, onion powder, and caroway. (As well as the cocoa powder, for the pumpernickel half.)
Mix the water into both of the rye pre-ferments, forming a slurry. Add the rye and pumpernickel slurry into their respective portions of flour and mix. Knead each half until it forms an easily workable dough. Cover with a wet kitchen towel and allow to rise for ~40 minutes.
Roll both halves out to slightly less than the thickness of a pinky finger, while keeping both halves approximately the same size. Mist one side of each half with water and lay them on top of each other, wet halves together. Roll lightly to remove any air pockets and stick the dough together.
Mist the top of the dough and begin to roll it like a scroll, maintaining tension and misting the other side as you roll.
Ensure the roll is sealed and will not unravel, then place it in a banneton or other container for it to proof until doubled. When it is close to being ready, preheat the oven to 200c with a Dutch oven or oven pan.
Brush with egg wash and score the dough thrice before placing into the Dutch and covering with the lid or onto the pan and tenting with foil. Bake for 15 minutes.
Reduce to 175c and bake for 20 minutes.
Uncover and bake for 5 more minutes, ensure center reads 200f before removing the loaf. Let the loaf rest lightly covered overnight.