This keto grilled cheese sandwich (90-second bread) fries up buttery and golden with a gooey cheddar center, using a microwave bun that's ready before the skillet is even hot. Lunch lands on the plate in 10 minutes at 5g net carbs. Pair it with tomato soup and the nostalgia is complete.
There are few things more comforting than a perfectly golden, outrageously cheesy grilled cheese sandwich. But on a low-carb journey, that simple pleasure can feel worlds away. Until now! This recipe is a total game-changer, using a lightning-fast 90-second microwave bun that transforms into the perfect vessel for melted cheddar. It’s buttery, crispy, and holds together beautifully, delivering all the nostalgic comfort you crave without the carbs. Paired with a warm bowl of tomato soup, this is the quick and satisfying keto lunch you’ve been dreaming of.
Ingredients
• 2 large eggs
• 2 tbsp / 14 g (0.49 oz) almond flour
• 1 ½ tbsp / 12 g (0.42 oz) psyllium husk powder
• ½ tsp baking powder
• 2 tbsp / 28 g butter, softened
• 2 oz / 56 g cheddar cheese, sliced or shredded
• 1 tbsp / 14 g (0.49 oz) butter, for frying
Instructions
1. In a small bowl, whisk together the eggs, almond flour, psyllium husk powder, baking powder, and softened butter until a thick, smooth batter forms. Pour the batter into a greased, microwave-safe square container (about 4×4 inches) and microwave on high for 90 seconds. The ‘bun’ will be firm to the touch.
2. Carefully remove the hot container from the microwave and let the bun cool for a minute before turning it out onto a cutting board. Slice it in half horizontally to create two ‘bread’ slices. Layer the cheddar cheese between the slices to assemble your sandwich.
3. Melt the remaining tablespoon of butter in a non-stick skillet over medium heat. Place the sandwich in the pan and fry for 2-3 minutes per side, until the bread is golden brown and crispy, and the cheese is perfectly melted and gooey. Serve immediately.
Nutritional Information
• Serves: 1
• Calories: 794
• Fat: 72g
• Net Carbs: 5g (0.18 oz)
• Protein: 30g
Pro Tips
• Experiment with different cheeses! A mix of Gruyère and cheddar adds a nutty, complex flavor, while Provolone offers a fantastic cheese pull.
• Elevate your keto bread by mixing in a pinch of garlic powder, onion powder, or a tablespoon of grated Parmesan cheese into the batter before microwaving.
• For the best texture, let the microwave bun cool completely before slicing and frying. This helps it firm up and prevents it from becoming crumbly.
• For an extra crispy texture, cook the batter in a mini waffle maker instead of the microwave to create two keto ‘chaffles’ for your sandwich.
FAQ
Q: Can I use a different flour instead of almond flour
A: This recipe is specifically optimized for almond flour’s texture and moisture content. Substituting it with another flour, like coconut flour, would require significant adjustments to the egg and butter ratios and may produce a different result.
Q: Why is my keto bread falling apart
A: For the best, sturdiest bread, allow the 90-second bun to cool completely on a cutting board before you slice it. This step is crucial as it allows the psyllium husk to set and firm up the structure, preventing it from being crumbly.
Q: How can I get an extra crispy keto grilled cheese
A: For maximum crispiness, you can cook the batter in a mini waffle maker instead of the microwave to create two ‘chaffles’. Frying these chaffles in butter will result in an exceptionally golden and crispy sandwich.
Q: What other cheeses work well in this recipe
A: While cheddar is a classic choice, feel free to experiment. The recipe notes suggest using Provolone for a great cheese pull or a mix of Gruyère and cheddar for a more complex, nutty flavor.
Pro Tips
- Let the microwaved bun cool completely on the cutting board before slicing — that rest lets the psyllium husk set the structure so the bread slices cleanly instead of crumbling.
- Mix a pinch of garlic powder, onion powder, or a tablespoon of grated Parmesan into the batter before microwaving to give the bread more character on its own.
- For an even crispier sandwich, cook the batter in a mini waffle maker instead of the microwave and use the two 'chaffles' as your bread — frying them in butter takes them deep golden.
- Experiment with the filling: a mix of Gruyère and cheddar adds nutty complexity, while Provolone gives you the best cheese pull.
- Stick with almond flour — coconut flour absorbs far more moisture and would need the egg and butter ratios reworked to get the same crumb.
Frequently Asked Questions
Can I use a different flour instead of almond flour?
This recipe is tuned to almond flour's texture and moisture. Swapping in something like coconut flour would require significant adjustments to the egg and butter ratios.
Why is my keto bread falling apart?
It probably wasn't cooled before slicing. Letting the bun cool completely allows the psyllium husk to firm up the structure, which is what keeps it from being crumbly.
How can I get an extra crispy keto grilled cheese?
Cook the batter in a mini waffle maker to make two chaffles instead of one microwave bun, then fry the sandwich in butter until it's exceptionally golden and crisp.
What other cheeses work well in this sandwich?
Cheddar is the classic, but Provolone gives a fantastic cheese pull and a Gruyère-cheddar mix brings a more complex, nutty flavor.
Recipe card below.
More Recipes You’ll Love
- Bell Pepper Basil Pizza with Almond Flour Crust
- Keto Bacon & Zucchini Bread
- Plain and Simple Keto Almond Flour Bread
Keto Grilled Cheese Sandwich (90-Second Bread)
Ingredients
Method
- In a small bowl, whisk together the eggs, almond flour, psyllium husk powder, baking powder, and softened butter until a thick, smooth batter forms.
- Pour the batter into a greased, microwave-safe square container (about 4x4 inches) and microwave on high for 90 seconds. The 'bun' will be firm to the touch.
- Carefully remove the hot container from the microwave and let the bun cool for a minute before turning it out onto a cutting board.
- Slice it in half horizontally to create two 'bread' slices.
- Layer the cheddar cheese between the slices to assemble your sandwich.
- Melt the remaining tablespoon of butter in a non-stick skillet over medium heat.
- Place the sandwich in the pan and fry for 2-3 minutes per side, until the bread is golden brown and crispy, and the cheese is perfectly melted and gooey.
- Serve immediately.
Nutrition
Tried this recipe?
Let us know how it was!Kitchen essential: soup
