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Savory Steamed Egg Custard (Chawanmushi)

Name: Savory Steamed Egg Custard (Chawanmushi)
Prep time: 20 min
Cook time: 45 min
Total time: 65 min
Yield: 4 servings
Cuisine: japanese-washoku
Ingredients: 10 g (1 large piece) organic kombu (dried kelp), wiped clean; 2 cups filtered water, cold; 4 large pasture-raised eggs, room temperature; 3.5 oz wild-caught shrimp, peeled, deveined, halved; 5.3 oz fresh shiitake mushrooms, sliced thin; 1/2 cup cold dashi stock, strained; 1 tbsp organic gluten-free tamari, sugar-free; 1 tbsp dry sake (junmai), no added sugar; 1 tsp pure date syrup, liquid; 4 tsp extra-virgin olive oil, cold-pressed

Silky, savory egg custard steamed with homemade kombu dashi, pasture-raised eggs, and wild-caught shrimp. This breakfast dish delivers a gentle protein boost without the sugar crash, relying on natural umami from kelp and mushrooms.

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Serves

Prep

20 min

Cook

45 min

Per serving

454 kcal· 7g protein

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Savory Steamed Egg Custard (Chawanmushi) — authentic Japanese Washoku recipe from Taste Meridian

Ingredients

Serves

Dashi Base

10 g (1 large piece)organic kombu (dried kelp), wiped clean
2 cupsfiltered water, cold

Custard & Toppings

4 largepasture-raised eggs, room temperature
3.5 ozwild-caught shrimp, peeled, deveined, halved
5.3 ozfresh shiitake mushrooms, sliced thin
1/2 cupcold dashi stock, strained
1 tbsporganic gluten-free tamari, sugar-free
1 tbspdry sake (junmai), no added sugar
1 tsppure date syrup, liquid

Finishing

4 tspextra-virgin olive oil, cold-pressed

Equipment

bamboo or metal steamer basket — allows even steam circulation without boiling water contact
fine-mesh sieve — removes egg chalaza for perfectly smooth texture
chawanmushi cups or ramekins — traditional shallow vessels ensure even steaming
digital kitchen thermometer — ensures water stays below 100°C to prevent curdling

A little context

Chawanmushi is a cornerstone of Washoku, traditionally steamed in small cups to highlight seasonal ingredients. We honor this tradition by making dashi from scratch rather than using powdered bouillon, and we replace sugar-heavy mirin with dry sake and a minimal amount of whole date syrup to respect the Blueprint low-glycemic standard.

Why this food

The longevity story

Pasture-raised eggs provide high-quality choline and omega-3s critical for brain function. Kombu kelp is rich in iodine for thyroid health and contains alginates that support gut lining integrity. Wild-caught shrimp adds astaxanthin, a potent antioxidant that reduces oxidative stress. The finish with extra-virgin olive oil introduces polyphenols to support cardiovascular health.

Method

01
Prepare Dashi
Wipe the kombu with a damp cloth to remove dust. Place kombu in 500 ml cold water and let sit for 30 minutes. Heat gently until just before boiling (approx 60°C), then remove the kombu immediately to prevent bitterness. Set aside 120 ml for the custard.
02
Prep Toppings
Slice the shiitake mushrooms thinly. Peel and devein the wild-caught shrimp, cutting each in half if large. Blanch mushrooms in boiling water for 1 minute, then drain thoroughly. This removes excess moisture that could water down the custard.
03
Whisk Eggs
Crack the pasture-raised eggs into a bowl. Whisk gently with a fork until just combined—do not overbeat or create too much foam. Strain the eggs through a fine-mesh sieve to remove chalaza and ensure a silky texture.
04
Season Custard
Mix the 120 ml cold dashi, tamari, dry sake, and date syrup in a separate bowl. Slowly pour this mixture into the strained eggs while stirring gently. The ratio should be roughly 1:1.5 egg to liquid for a firm but tender set.
05
Strain Again
Pour the combined egg and dashi mixture through the fine-mesh sieve one final time into a pouring jug. Skim off any surface bubbles with a spoon. This is critical for the glass-smooth finish.
06
Fill Cups
Divide the mushroom slices evenly among four chawanmushi cups or ramekins. Place the shrimp halves on top. Pour the egg mixture over the toppings, filling each cup about 80% full to allow for expansion.
07
Steam
Cover each cup with plastic wrap or a small plate to prevent water droplets from falling on the custard. Place in the steamer basket over simmering water (do not boil vigorously). Steam for 12-15 minutes until the center is just set but still slightly jiggly.
08
Finish and Serve
Remove from heat and let rest for 2 minutes. Drizzle 1 tsp of cold-pressed extra-virgin olive oil over each cup to add healthy fats and polyphenols. Serve immediately while warm.

Nutrition facts

Per serving · 1 of 4

Calories

454

Protein

33g

Carbs

35g

Fat

— Saturated: 4 g
— Polyunsaturated: 21 g
Carbohydrates: 33 g
— Fiber: 5 g
— Sugars: 3 g
Cholesterol: 30 mg
Sodium: 147 mg
Potassium: 632 mg

Estimated from USDA FoodData Central for matched ingredients (70% ingredient coverage). Values vary with brand, preparation, and exact measurements.

Pro tips

✦Source your kombu from a reputable Japanese grocer; avoid seaweed that looks overly dark or brittle as it may be old.
✦Keep your water temperature low while steaming; high heat causes the eggs to turn into scrambled bits rather than custard.
✦If you don't have chawanmushi cups, use shallow ramekins but reduce steaming time by 2 minutes.
✦The custard is done when a toothpick inserted near the center comes out clean, but the center still trembles slightly.

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Equipment

Steamer Basket →Thermometer →

Specialty ingredients

Dashi →Kombu →

Substitutions

wild-caught shrimp → wild-caught scallops or chicken breast (diced tiny) (scallops add sweetness; chicken adds bulk but less astaxanthin)
date syrup → monk fruit liquid sweetener (use 1:1 ratio, no sugar content for strict low-glycemic)
shiitake mushrooms → fresh spinach or asparagus tips (add delicate greens in the last 2 minutes of steaming)

Storage

Refrigerate in airtight glass containers for up to 2 days. Reheat gently in a steamer for 5 minutes; do not microwave as it will toughen the eggs.

What to serve with it

hot sencha green tea
sparkling water with lemon wedge
small side of natto for fermentation boost

FAQ

Why did my custard turn out rubbery?+

This usually happens from over-steaming or water that is boiling too hard. Lower the heat to a simmer and check 2 minutes early.

Can I make this vegan?+

Yes, substitute eggs with silken tofu blended with nutritional yeast and agar-agar, though the texture will differ significantly from traditional chawanmushi.