Keto Asparagus with Hollandaise Sauce
Asparagus with hollandaise is one of the most beautiful warm side dishes there is, and it's almost naturally keto. Green asparagus contains only 2 g of net carbohydrates per 100 g, and a real hollandaise made from egg yolk and butter is essentially pure fat. Per serving: 4 g net carbs, 38 g fat, 8 g protein. Pairs well with salmon, steak, pork medallions, or simply with a poached egg as a light main course.
Key points at a glance
- Prep time: approx. 25 minutes.
- Approx. 4 g net carbs and 38 g fat per serving.
- Ingredients: green asparagus, egg yolk, butter, lemon, white wine.
- Important: prepare the sauce over a water bath, never heat the egg yolk directly on the bottom of the pan.
Ingredients
Serves 4 as a side dish, for example alongside salmon or beef fillet.
| Amount | Ingredient | Note | ||
|---|---|---|---|---|
| green asparagus | - | |||
| salt for cooking water | approx. 1 tsp | |||
| approx. 1 tsp | ||||
| dry white wine | - | |||
| white wine vinegar | approx. 1 tbsp | |||
| approx. 1 tbsp | ||||
| shallot | finely chopped | |||
| finely chopped | ||||
| peppercorns | - | |||
| bay leaf | - | |||
| butter | - | |||
| egg yolk | size M | |||
| size M | ||||
| lemon juice | approx. 1 tbsp | |||
| approx. 1 tbsp | ||||
| salt | to taste | |||
| to taste | ||||
| cayenne pepper | to taste | |||
| to taste | ||||
Preparation
Asparagus: Wash 800 g of green asparagus, peel the lower third on a work surface if it's woody, and cut off 1 to 2 cm from the ends. Bring 1 litre of water with 1 tsp of salt to a boil in a wide pan, add the asparagus and cook for 6 to 8 minutes until tender-crisp. Lift into a pre-warmed dish with tongs. Reduction: In a small saucepan, simmer 50 ml of dry white wine, 1 tbsp of white wine vinegar, 1 finely chopped shallot, 5 peppercorns and 1 bay leaf down to 2 tbsp, then strain through a sieve into a metal bowl. Hollandaise: Slowly melt 200 g of butter and let it cool slightly. Place the metal bowl with the reduction and 3 egg yolks over a pan of gently simmering water (the bottom must not touch the water). Whisk for 3 to 4 minutes until the egg yolk is pale and creamy and leaves trails. Drizzle in the liquid butter drop by drop at first, then in a thin stream, whisking constantly. Season with lemon juice, salt and a pinch of cayenne. Pour immediately over the warm asparagus.
Why is hollandaise a keto sauce?
Hollandaise is an emulsion of egg-yolk lecithin, water (from the reduction and the yolks) and butter fat, which makes it almost pure fat with barely any carbs. Per 100 g of hollandaise there's less than 1 g of carbohydrates but around 75 g of fat. The asparagus itself provides valuable micronutrients (folate, vitamin K, potassium) while staying very low in carbs. The combination is classic and nutritionally excellent for a ketogenic meal.
Source: USDA FoodData Central - Asparagus, raw , USDA FoodData Central - Butter, salted
Variations and rescue tips
White asparagus: Use white asparagus instead of green, peel it and cook for 15 to 20 minutes in salted water with a little lemon and butter. With a blender: Put the reduction and egg yolks into a narrow jug, blitz with an immersion blender and add the hot liquid butter in a thin stream. Ready in 2 minutes and nearly foolproof. If the sauce splits: Place a fresh egg yolk into a warm bowl and whisk in the broken hollandaise a spoonful at a time. This will rescue the emulsion. Flavour variations: Adding tarragon to the reduction makes a sauce béarnaise; a little mustard makes a mustardy version for steak; chives stirred in at the end pair beautifully with salmon.
Tips for foolproof hollandaise
- Melt the butter, but don't let it get too hot, or the egg yolk will curdle instantly.
- Keep the water bath at a gentle simmer, not a rolling boil.
- The bowl must not touch the water.
- Add the butter drop by drop first, then in a thin stream.
- Serve the sauce straight away. Finished hollandaise tends to break when reheated.
Nutrition values
| Nutrient | Per serving | Keto context |
|---|---|---|
| Calories | approx. 420 kcal | Rich. |
| Rich. | ||
| Fat | approx. 38 g | From butter and egg yolk. |
| From butter and egg yolk. | ||
| Net carbs | approx. 4 g | Low. |
| Low. | ||
| Protein | approx. 8 g | From egg yolk and asparagus. |
| From egg yolk and asparagus. | ||
| Fibre | approx. 3 g | From asparagus. |
| From asparagus. | ||
| Salt | approx. 1.2 g | To taste. |
| To taste. | ||
Note: Nutrition values are estimated averages per 100 g and per serving and may vary depending on ingredients, brands, portion size, and preparation. They do not replace individual nutrition or medical advice.
FAQ
Can I prepare the hollandaise in advance?
Classic hollandaise is a last-minute sauce. It will keep briefly in a thermos flask or over a lukewarm water bath (maximum 50 °C). Any hotter and the egg yolk will curdle. Reheating barely works, so make it fresh.
Should I use white or green asparagus?
Both work. Green asparagus gets to the plate faster, while white asparagus needs peeling and longer cooking but has the classic character. Both are keto-friendly in flavour; green contains slightly fewer carbs.
Can I make it without white wine?
Yes. Instead of 50 ml of wine use 50 ml of water plus 2 tbsp of white wine vinegar. The flavour becomes a touch sharper but still works. The wine itself can be used sparingly on keto, since the residual sugars cook off almost entirely during reduction.
Does asparagus with hollandaise work for keto weight loss?
Yes, with one caveat. At 4 g of net carbs the dish is easy to fit in, but 38 g of fat per serving means the calories add up fast. Treat it as the main course rather than a side to a meat dish.