Step 1

Make the light rye dough: In a large bowl, combine yeast, 1 cup bread flour, salt, sugar and caraway seeds; mix well. Add water and oil to flour mixture. Mix using wooden spoon or dough whisk until all ingredients are incorporated and have a shaggy dough. Gradually stir in rye flour and enough of the remaining bread flour to make a firm dough. Knead on lightly floured surface 5 to 7 minutes until smooth and elastic. Place dough in lightly oiled bowl and turn to grease top. Cover; let rise until indentation remains after poking dough with finger down to second knuckle; about 1 hour.

Step 2

Make the dark rye dough: In a large bowl, combine yeast, 1 cup bread flour, salt, sugar, caraway seeds and cocoa; mix well. Add water and oil to flour mixture. Mix using wooden spoon or dough whisk until all ingredients are incorporated and have a shaggy dough. Gradually stir in rye flour and enough of the remaining bread flour to make a firm dough. Knead on lightly floured surface 5 to 7 minutes until smooth and elastic. Place dough in lightly oiled bowl and turn to grease top. Cover; let rise until indentation remains after poking dough with finger; about 1 hour.

Step 3

On lightly floured surface, divide each dough in half. Roll or pat each half to a 14x7-inch rectangle. For a dark crust, place a light rye piece on top of a dark rye. For a light crust, place a dark rye piece on top of a light rye. Starting with shorter side, roll up tightly, pressing dough into roll with each turn. Pinch edges and ends to seal. Working from the center of the loaf to the ends, gently roll the loaf back and forth to form a baguette shape approximately 14-inches long. Place on a greased or silicone-lined baking pan. Repeat for second loaf. Cover loaves; let rise until indentation remains when lightly touched.

Step 4

Preheat oven to 375°F. After dough has risen, bake until internal temperature tests 190°F, about 40-45 minutes. Remove from pan; cool on rack.