This, the original and best Keto Fettuccini Alfredo recipe, is so creamy and satisfying that it will make sticking to your 5 day egg fast a breeze! In fact this keto Fettuccini Alfredo is so good that you may end up adding it to your weekly rotation!

I made it! 5 days on the IBIH Keto Egg Fast Diet and I’m down a total of 7.4 lbs as of this morning! This Keto Egg Fast Fettuccini Alfredo recipe is a keeper, and definitely contributed to my successfully staying on the keto egg fast for the full 5 days!
I’m already deep in ketosis (the strips are purple which NEVER happens,) from this keto egg fast, and I’m hoping that maintaining my macros at a really high fat content, very low carb, and less protein than usual rate will keep the weight from coming back on overnight.
I’ll be reporting my weight fluctuations daily via Instagram and Facebook, but won’t have time to post anything here on the blog for the next few days. I’ll update you in a post sometime this weekend though, with a 7 day Egg Fast menu plan (5 days on, 2 days off) soon to follow.
What I Ate on Day Five of the Keto Egg Fast Diet
7 eggs
2 Tbsp MCT oil
5 Tbsp butter
1 Tbsp mayonnaise
4 oz cream cheese
2 string cheese
1 oz cheddar
1 Tbsp grated parmesan
120 oz spring water
I’m not going to lie, yesterday was ROUGH! By about noon the idea of eating another egg in any form was making me want to hurl. I was cranky, had a headache, and really wanted to quit this keto egg fast. It didn’t help that Mr. Hungry was churning out delicious smelling pizzas in our wood-fired oven either! This keto egg fast fettuccini alfredo recipe saved the day for sure!

It’s not easy to get the right consistency in a flourless keto “pasta,” and believe me I’ve tried. I finally hit on a combo that provides just the right aldente “bite” that feels like eating the real thing. Not too mushy, perfectly pliable, and doesn’t fall apart in the sauce.
And the sauce – oooooh the sauce! This keto egg fast fettuccini alfredo sauce is so creamy and cheesy that I prefer it over the flour-laden real thing! And it’s so easy to make – it literally takes less than two minutes, and can be used to dress up chicken, veggies, pretty much any savory dish will be improved with a heaping tablespoon of this easy keto egg fast alfredo sauce!!!

I’m writing this keto fettuccini alfredo recipe as a single serving because the pasta doesn’t reheat well – I hit it in the microwave while in the sauce because it got cold while taking the photos, and the “pasta” got a little tough – not horrible, just not as good as fresh.
The sauce for this keto fettuccini alfredo recipe reheats fine though – so you can make extra of that if you want, so you have it on hand. This is incredibly rich, so if you can’t eat it all, then just be sure to reheat it very gently for as little time as possible, so your keto noodles don’t get too tough.
Keto Fettuccini Alfredo
- Total Time: 15 minutes
- Yield: 1 serving 1x
- Diet: Diabetic
Description
Keto Fettuccini Alfredo that tastes like the real thing and works for a regular low carb diet or the 5 day keto egg fast.
Ingredients
- 2 eggs
- 1 oz cream cheese
- pinch of salt
- pinch of garlic powder
- 1/8 teaspoon black pepper
- 1 oz Mascarpone cheese
- 1 tablespoon grated parmesan cheese
- 1 tablespoon butter
Instructions
- Blend the eggs, cream cheese, salt, garlic powder, and pepper in a magic bullet or blender.
- Pour into a butter-greased 8 x 8 pan.
- Bake at 325 degrees Fahrenheit for 8 minutes or until just set.
- Remove and let cool for about 5 minutes.
- Using a spatula, gently release the sheet of “pasta” from the pan.
- Roll it up and slice with a sharp knife into 1/8 inch thick slices.
- Gently unroll and set aside.
- Combine the mascarpone, parmesan cheese, and butter in a small bowl.
- Microwave on high for 30 seconds.
- Whisk.
- Microwave on high another 30 seconds.
- Whisk again until smooth (this may take a minute because the sauce will have separated – keep whisking and it will come back together!)
- Add the pasta to the hot sauce and toss gently.
- Serve immediately with more freshly ground black pepper if desired.
Notes
Approximate net carbs per serving = 2g
Alternative Sauce Recipe:
As an alternative to the mascarpone, you can make this sauce in the same method with 2 oz cream cheese, 2 Tbsp heavy whipping cream, 1 Tbsp parmesan, 1 Tbsp butter – it will taste amazing, but is not technically legal on the Egg Fast due to the heavy whipping cream. I doubt it will make a big difference in your results though, so if it’s what you have on hand, go for it!
- Prep Time: 5 minutes
- Cook Time: 10 minutes
- Category: Egg Fast Recipes
- Method: microwave
- Cuisine: Italian
Nutrition
- Serving Size: Approximately 1 cup
- Calories: 491
- Fat: 47g
- Carbohydrates: 2g net
- Protein: 19g
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Elizabeth says
Making this now and the pasta is very soft. I tried letting it sit for 5 minutes but it’s still soft. I’ll try putting it back in the over to see if that helps. I don’t want to burn it
Kim says
This is really, really AMAZING! I licked the bowl.
Adrienne says
This was so gosh darn good. Sadly, my entire family LOVED it too. I had to share my one small serving with them. Next time I will definitely make multiple batches. I look forward to trying more of your recipes.
Helena Angelina says
WOW, this recipe blew my socks off – and I wasn’t expecting it! I knew it would be yummy, but I just didn’t expect it to be oh so ..”Stuff mac n cheese, I have my egg fast fettuccini alfredo!”It really hits the spot if you’re craving pasta and cheesey white sauce in a way I hadn’t expected.
Many thanks again Melissa, this one is going to become a staple in my house, egg fast or no egg fast!
Mellissa Sevigny says
You’re welcome Helena, so glad you liked it!
Laura says
I made 4 8×8 pans of “noodles” and used them for lasagna (2 noodles per layer). It was delicious. I highly recommend it.
Mellissa Sevigny says
Thanks Laura, I’ve used it for lasagna too and it works great! Glad you liked it!
MzBaker says
OMG Good Thinking! you can use the same pan you make the squares in after for the lasagna! OHHH Man this is Awesome!!
Sarah says
Omg that is such a good idea!
Nikki Stone (Business) says
YESSS! I was hoping someone had tried this as lasagna noodles! I’m going to try the lasagna idea Sunday for family dinner!
Allison says
This was so good!! I was very skeptical about the noodles. So I made the sauce for some veggies and it was great. Weeks later I made the noodles and was BLOWN AWAY by how great they taste and the noodle-like texture! so so good!! Definitely will make this often!! My noodles had a spot on it that was not 100% set but it was fine. I had to cook the noodles an additional minute or two. I don’t think I left it to sit long enough once out of the oven either.
Lisa says
Just finished this for dinner tonight and day 5 of my egg fast. This recipe…oh this recipe…it is RIDICULOUSLY easy to make, and SOOOOO GOOD!!! You must be a friggin genius! :) I followed your plan to a T. Every single meal and snack has been a treat. I don’t feel smaller (I’ll find out officially tomorrow), but whatever the results the scale says, I have some amazing new recipes to use for lunches, dinners, and breakfasts. And I will be using mascarpone in so many more things than tiramisu now too! LOVE. Thank you!!
Josye says
I am lactose intolerant but I really want to try this great recipe so for the pasta, instead of using cream cheese I used goat cheese and it was so delicious, the texture turned out to be great and so was the flavor. I used goat cheese instead of the mascarpone and the Parmesan cheese and worked just fine. Anyone who enjoys goat cheese would love this adaptation to you great recipe. Thank you!
Mellissa Sevigny says
I love goat cheese Josye, definitely going to try your version, sounds fabulous!!!
Pat says
I am-noodle challenged as well. They turned terrible. Were still runny raw at 8 min so I nuked them and it puffed up too much. The sauce was delish and I ate it but probably won’t try this again anytime soon. Too many other options that I do like.
I’m on my 3rd day of an Egg Fast. I’ve done it twice before and nothing kills my cravings like this Egg Fast. It sure works to get me jump-started.
Thanks.
sharon r says
Thank you so much for all your yummy recipes. I made this for dinner tonight and it was fantastic.