Low-Carb Reuben Chaffle Sandwich Recipe for Keto Fans

Looking for a fresh keto lunch idea? Try this Low Carb Reuben Chaffle Sandwich — a satisfying, flavorful meal that tastes indulgent while staying low in carbs.

Low Carb Reuben Chaffle Sandwich Recipe

Rye Bread Chaffle Ingredients

• 1 egg
• 2 tablespoons almond flour
• 1 tablespoon melted butter
• 1 tablespoon shredded mozzarella cheese
• Pinch of salt
• Pinch of garlic powder
• 1/2 teaspoon baking powder
• 1/2 teaspoon caraway seeds

Reuben Sandwich Ingredients

• 2 tablespoons sauerkraut
• 2 slices Swiss cheese
• 1–2 ounces thinly sliced corned beef or pastrami

Russian Sauce Ingredients

• 1 tablespoon mayonnaise
• 1 teaspoon sugar-free ketchup
• 1 teaspoon dill relish
• Pinch of monk fruit sweetener (optional)

Instructions

1. Preheat a mini waffle maker (or full-size waffle iron if preferred).
2. In a small bowl, mix the chaffle ingredients until smooth.
3. Cook the batter in the mini waffle maker for about 4 minutes, or until the chaffle is set and lightly golden. Repeat for a second chaffle so you have two “slices.”
4. Stir together the Russian sauce ingredients in a small bowl and adjust seasoning to taste.
5. Assemble the sandwich: place Swiss cheese on one chaffle, add the warm corned beef or pastrami, top with sauerkraut, a drizzle of Russian sauce, then close with the second chaffle. Serve immediately.

Nutrition (per recipe)

Serves 2. Approximate per serving: Calories 227, Total Carbs 6.2g, Fiber 1g, Net Carbs 5.2g, Sugars 1.2g, Fat 16.2g, Protein 10.6g. Nutrition values are estimates and may vary depending on specific ingredients used.

Tips & Variations

• For a crispier chaffle, reheat briefly in an air fryer — it restores crunch better than a microwave.
• Double the chaffle batter when using a full-size waffle maker and cook according to your appliance’s size.
• Swap pastrami for corned beef, or use leftover roast beef for a different flavor.
• Make the Russian sauce milder or tangier by adjusting the ketchup and relish quantities.

About Chaffles

Why “chaffle”?

“Chaffle” combines the words cheese and waffle — a popular keto-friendly option where cheese forms the base of a quick, low-carb waffle used as bread or a snack.

Make ahead and storage

Chaffles freeze and refrigerate well. Store cooled chaffles airtight for up to a week in the fridge or up to a month in the freezer. Reheat in a toaster oven or air fryer for best texture.

New to keto? A simple starter guide and basic ingredient lists can help you learn macros, ketosis basics, and meal planning techniques when beginning a low-carb lifestyle.

Here are a few photos from making this recipe.

Related Keto Chaffle Recipes

Explore more chaffle-based lunch ideas: BLT chaffle sandwiches, turkey lettuce wraps, and a variety of keto bread alternatives for sandwiches and toasts.

Printable Recipe Card

Nutrition facts are provided as a courtesy and may vary depending on ingredient brands and portion sizes.