Ancient Grain and Seed Sourdough Sandwich Loaf

October 20, 2025

Jump to Recipe

Early on in my cottage bakery journey, I knew I wanted to offer a hearty loaf to my customers. I’d watch bakers in England and Germany making these beautiful seed-coated loaves, often half whole wheat, and I couldn’t stop thinking about how real and nourishing they looked. I started experimenting with freshly milled grains and found that 40% organic spelt was the sweet spot. It added a rich, nutty depth without making the bread too heavy or too savory.

Thank you for reading this post, don't forget to subscribe!

This ancient grain sourdough bread has become one of the most popular loaves at my cottage bakery, and for good reason. The crumb is soft and moist, the crust is rustic and flavorful, and it’s versatile enough for sandwiches, toast, or even rolls.

I use freshly milled spelt flour, but any whole wheat will work beautifully if that’s what you have on hand. It’s gentle on the gut, sturdy enough to slice, and has that wholesome flavor that makes sourdough feel like home.

Watch the video tutorial to see how I mix, stretch, and fold this dough step-by-step.

Ancient Grain & Seed Sandwich Loaf

Print Recipe
This one’s nutty, rustic, and full of character. Made with 40% spelt flour and coated in a blend of seeds that toast up beautifully in the oven. My customers swear it’s the best for hearty sandwiches, avocado toast, or a thick slice with butter and honey.
Prep Time 30 minutes
Cook Time 40 minutes
Resting Time 12 hours
Servings 1 Large Loaf

Equipment

Ingredients

  • 50 grams bubbly, active sourdough starter (100% hydration) optional: use 100g for faster proofing time
  • 365 grams warm filtered water
  • 180 grams spelt flour
  • 300 grams all-purpose flour (11%+ protein), or bread flour
  • 20 grams honey
  • 10 grams fine sea salt
  • Mixed seeds for rolling (I use sesame, flax, sunflower, and pumpkin)

Instructions

  • Mix. Combine your starter, water, flours, salt and honey. Mix by hand until no dry bits remain and let rest for 30 minutes.
  • Stretch and Folds. Wet your hand to prevent sticking, gently grab one side of the dough, stretch it upward, then fold it over to the opposite side.
    Turn the bowl a quarter turn and repeat the motion. Continue until you’ve stretched and folded from all four sides.
    That’s one set. Cover the bowl and let the dough rest for 30 minutes before repeating.
    You’ll do this three times total, 30 minutes apart. Each set helps the dough become smoother, stronger, and more elastic. By the end, it should hold its shape better and feel lighter and puffier to the touch.
  • Bulk Fermentation. Let the dough rest for the remainder of bulk fermentation, until it has roughly doubled in size (about 5hrs).
  • Pre-shape and Rest. Turn out the dough and gently pre-shape it into a round or oval. Rest uncovered for 20–30 minutes.
  • Final Shape & Coating. Shape into a sandwich loaf (see shaping technique in the video), then roll in a mix of seeds. If the seeds aren't sticking, lightly mist the surface of your dough with water and then roll in the seeds.
    Optional: shape into a batard and bake in a dutch oven for a boule shape.
  • Proof. Place into a loaf tin, seam side down. Cover and cold-proof in the fridge overnight (8–12 hours). Although I highly recommend the overnight cold proof for deeper flavor, if you do want to skip it, you can just proof on the counter for 1-2 hours before baking.
  • Bake. Preheat the oven to 430°F (220°C).
    If baking in a loaf pan, lightly spritz the top of the dough with water, then place a second loaf pan upside down on top to create a little steam chamber. This helps your bread rise beautifully and develop a soft, open crumb, similar to baking in a Dutch oven.
    Bake for 20 minutes, then remove the top pan and continue baking for another 20 minutes, or until the internal temperature reaches 200–205°F (93–96°C). If the seeds start to brown too quickly, tent the loaf with a piece of foil for the last 5–10 minutes.
    For a boule or Dutch oven, bake covered for 20 minutes, then uncover and bake for another 25–30 minutes, until golden brown and internal temp reaches 200–205°F (93–96°C).
    Let cool for 1 hour before slicing. Enjoy!

Notes

Whole Wheat Baking Tips
Ferments faster: Whole wheat dough proofs more quickly than white flour, so keep an eye on it during bulk fermentation.
Needs more water: The bran and germ absorb more hydration, so your dough might feel a little stickier than usual. That’s perfectly normal.
Handle gently: A wetter dough can be trickier to shape. Use a light touch and a bench scraper to help guide it along.
Bake a little longer: Whole wheat loaves sometimes need a few extra minutes in the oven. Look for a deep golden crust and a hollow sound when tapped on the bottom, or if you want to be precise, use a thermometer to make sure it’s baked through to 200-205°F (93–96°C).

Bread & Butter Newsletter

SIGN UP FOR THE

Pull up a chair at the kitchen table. Sign up for recipes, tools, and
fresh ideas straight to your inbox.