Sourdough Chaffle Sandwiches

If you're looking for a creative, low-carb, sourdough-forward twist on the classic sandwich, you're going to love these Baked Sourdough Chaffle Sandwiches. Chaffles—cheese + waffles—have become a popular keto staple, but we’re taking them to the next level by incorporating sourdough discard for extra flavor, baking them for simplicity, and turning them into melty, golden sandwiches that are satisfying, customizable, and crave-worthy.

Whether you're working through a jar of sourdough discard or simply want a grain-free option with that irresistible sourdough tang, this baked version of the chaffle makes it easier than ever to enjoy a crispy, cheesy, bready base for sandwiches. Let’s get baking!

Ingredients You’ll Need

For the Sourdough Chaffles (Makes 4 waffles, 2 sandwiches):

• 2 large eggs

• 1/2 cup sourdough discard (100% hydration)

• 1 cup shredded cheese (cheddar, mozzarella, or a blend)

• 2 tbsp almond flour (optional, for better texture)

• 1/4 tsp baking powder

• Pinch of salt

For the Sandwich Fillings (Customize to your liking):

• 4 slices deli turkey, ham, or cooked bacon

• 2 slices of your favorite cheese (Swiss, provolone, cheddar, etc.)

• Sliced tomato, avocado, or pickles

• Spinach, arugula, or baby greens

• Mustard, mayo, or aioli

Tools You’ll Need

• Mixing bowl and spoon or whisk

• Silicone waffle molds or a mini waffle maker (if not baking)

• Baking sheet

• Parchment paper or silicone baking mat

• Spatula

• Oven or toaster oven

Step-by-Step Instructions

Step 1: Preheat Your Oven

Preheat your oven to 375°F (190°C). Line a baking sheet with parchment paper or a silicone baking mat.

Step 2: Mix the Chaffle Batter

In a mixing bowl, whisk together the eggs, sourdough discard, shredded cheese, almond flour (if using), baking powder, and a pinch of salt. The mixture will be thick and cheesy—perfect for crisp chaffles.

Step 3: Portion and Bake

Scoop the batter into silicone waffle molds or shape into small rounds directly on the parchment-lined baking sheet. Use the back of a spoon to flatten slightly. Bake for 15–20 minutes or until golden brown and crisp around the edges.

Note: If using a waffle maker instead, cook each chaffle for about 3–5 minutes until golden and set.

Step 4: Assemble Your Sandwiches

Once your chaffles are done and slightly cooled, build your sandwiches. Layer on your preferred fillings—meat, cheese, veggies, and condiments—between two chaffles.

Step 5: Bake or Grill to Melt

Return the sandwiches to the oven for another 5–8 minutes until the cheese is melty and everything is warmed through. Alternatively, toast them in a skillet over medium heat with a bit of butter for a crispy grilled effect.

Step 6: Serve and Enjoy

Slice in half, serve warm, and enjoy the contrast of the crispy chaffle with the gooey, flavorful filling. These are excellent with a side salad, chips, or even dipped in soup.

Flavor Variations to Try

• Breakfast Sandwich: Add a fried egg, bacon, and a slice of cheddar.

• Caprese Style: Mozzarella, tomato slices, basil, and a drizzle of balsamic glaze.

• Buffalo Chicken: Shredded buffalo chicken, blue cheese crumbles, and ranch dressing.

• Veggie Melt: Roasted veggies like zucchini and peppers with hummus or pesto.

Tips for Success

• Use finely shredded cheese so the batter binds well.

• Let the chaffles cool slightly before assembling the sandwich—this helps prevent sogginess.

• Want extra crisp? Pop the finished sandwiches under the broiler for 1–2 minutes.

• Double the batch and freeze extras. Toast straight from frozen for quick sandwiches.

Make-Ahead and Storage

• Make Ahead: Chaffles can be made up to 3 days in advance and stored in the fridge.

• To Reheat: Toast in the oven or air fryer at 350°F for 5–6 minutes.

• To Freeze: Cool chaffles completely, then store in a zip-top bag with parchment between layers. Reheat from frozen.

FAQs

Can I make these dairy-free?

You can use dairy-free cheese, but note that it may not crisp the same way. Test a small batch first.

Can I use whole eggs and egg whites?

Yes, use 1 egg and 2 egg whites if you're looking to reduce fat slightly.

What if I don’t have a waffle mold?

Spoon batter into circles on parchment and bake like pancakes—they won’t have the same shape but will still be tasty.

Can I make these in an air fryer?

Yes! Cook chaffles at 375°F for 8–10 minutes until golden and crispy.

Final Thoughts

Baked sourdough chaffle sandwiches are the perfect hybrid of convenience, creativity, and craveable flavor. With just a few ingredients, minimal prep, and endless customization options, you’ll never look at traditional sandwiches the same way again. Whether you’re meal-prepping for the week or whipping up a quick lunch, these tangy, cheesy, crisp chaffle sandwiches deliver.

Enjoy them hot, cold, or somewhere in between—and don’t forget to experiment with your favorite fillings. With sourdough discard in the mix, you're giving your chaffles a flavor and texture upgrade that can't be beat.