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Seeking a sweet treat that feels genuinely nourishing without sacrificing taste? This Ama Koji Panna Cotta is one of my personal favorites. Spending my days creating and tasting traditional pastries means I am constantly surrounded by refined sugar. As a professional pastry chef, my daily routine revolves around tasting refined pastries, rich creams, and sugary confections. On my days off, I naturally seek balance and step away from refined sugar—yet my craving for a sweet bite after dinner or a mid-afternoon treat remains. This recipe is my personal answer to that craving: an elevated, guilt-free luxury.

That is where this Ama Koji Panna Cotta comes in. By using homemade Ama Koji (Japanese fermented rice paste), this recipe completely eliminates refined sugar while delivering a silky, luxurious texture.

Why You Will Love This Ama Koji Panna Cotta

In Japan, rice-koji amazake is celebrated not just as a traditional ferment, but as a drinkable beauty serum (飲む美容液). Because the fermentation process breaks down nutrients into their most bioavailable states, your body absorbs them effortlessly—nourishing your skin from the inside out.

Here is why this wellness dessert belongs in your routine:

• 100% Refined Sugar-Free & Naturally Energizing: The natural, soothing sweetness comes entirely from fermentation-derived glucose. Unlike refined white sugar, this natural glucose provides instant energy to support healthy skin cell turnover without the harsh insulin spikes or sugar crashes.
• Inner-Beauty & Skin Support: Packed with essential amino acids and a complex of B-vitamins (B1, B2, B6, and Niacin), Ama Koji provides the fundamental building blocks for collagen, helps balance sebum production, and prevents fatigue-induced skin dullness.
• Gut Health & Radiance (“Skin is a Mirror of the Gut”): In Japanese wellness culture, clear skin starts in the digestive tract. The prebiotics (oligosaccharides) and dietary fibers in raw Ama Koji feed your good gut bacteria, promoting digestion and flushing out toxins for a naturally glowing complexion.
• Active Probiotic Blueberry Topping: By folding raw Ama Koji into the blueberry sauce after it cools to 40°C, 100% of the live enzymes, beneficial microbes, and delicate floral aromas stay completely intact.
  

Ingredients of Ama Koji Panna Cotta

Yield: 6 individual cups (90g per cup)

Prep Time: 20 minutes | Chilling Time: 3–4 hours

Ama Koji Panna Cotta Base

• 200 g Ama Koji paste (chunky or smooth)
• 270 ml whole milk
• 100 ml heavy cream
• ½ tsp vanilla paste
• 6 g Knox powdered gelatin (approx. 2 tsp or 1 envelope)
• 30 ml (2 tbsp) cold water (for blooming)

Raw-Infused Blueberry Sauce

• 200 g blueberries (fresh or frozen)
• 100 ml white wine
• 15 ml (1 tbsp) fresh lemon juice
• 20 g raw honey
• 1 tsp cornstarch + 1.5 tsp cold water (whisked into a slurry)
• 60–70 g Ama Koji paste (added raw)

Instructions

1. Make the Raw-Infused Blueberry Sauce

1. In a small pot, combine 200g blueberries, 100ml white wine, 15ml lemon juice, and 20g honey. Bring to a gentle simmer over low heat for 2–3 minutes.
2. Gently press 3 or 4 berries against the side of the pot to release fruit pulp while keeping most berries whole.
3. Stir in the cornstarch slurry (1 tsp cornstarch + 1.5 tsp water) and let it boil gently for 30–60 seconds while stirring continuously until clear, glossy, and thickened.
4. Remove from heat and let cool until warm (~40°C).
5. Gently fold in 60–70g raw Ama Koji paste. Cover and set aside to cool completely.

2. Bloom the Gelatin

1. Pour 30ml cold water into a small bowl and sprinkle 6g Knox gelatin powder evenly over the surface.
2. Let sit undisturbed for 5 minutes to form a spongy disk.

3. Prepare the Panna Cotta Base

1. In a small saucepan, whisk together 200g Ama Koji, 270ml milk, 100ml heavy cream, and ½ tsp vanilla paste.
2. Warm over low heat, stirring occasionally, until it reaches 65°C (steaming and warm to the touch, but not boiling).
3. Remove from heat, add the bloomed gelatin disk to the warm base, and whisk until completely melted.
4. Blend the warm mixture with an immersion blender (hand blender) until silky smooth, then pass through a fine-mesh strainer.

4. Strain, Chill, and Pour

1. Set the strained base over an ice bath and stir gently for 2–3 minutes until slightly cooled. (This prevents the vanilla and subtle koji solids from settling to the bottom).
2. Pour 90g of mixture into each of 6 dessert glasses.
3. Cover and refrigerate for 3 to 4 hours until set with a soft wobble.

5. Assemble

Spoon the raw-infused blueberry sauce generously over each chilled panna cotta right before serving.

Storage & Frequently Asked Questions

How long can this be stored?

Keep the panna cotta cups covered in the refrigerator for up to 3 days. Because the blueberry sauce contains unheated raw Ama Koji, consuming it within 3 days ensures you get the absolute best flavor and maximum benefit from the active enzymes and probiotics.

Can I freeze this panna cotta?

Not recommended for the panna cotta itself—freezing breaks down gelatin’s protein network, causing it to weep liquid (syneresis) and turn grainy when thawed. However, yes, you can freeze the blueberry sauce! Store the sauce in an airtight container in the freezer for up to 1 month and thaw it overnight in the fridge before using.

Can I use plant-based milk instead of regular milk and heavy cream?

Yes! Unsweetened oat milk or unsweetened soy milk make fantastic substitutes. Oat milk’s natural creaminess pairs exceptionally well with the malted sweetness of Ama Koji. If you skip heavy cream entirely, replace it with an equal volume of your favorite plant-based milk (or full-fat canned coconut milk for extra richness).

Can I make this panna cotta with store-bought drinkable Amazake instead of Ama Koji paste?

Yes, but with two small tweaks! Commercial store-bought amazake is a drinkable liquid rather than a thick, concentrated ferment paste like homemade Ama Koji. If you use store-bought amazake:

1. Adjust the Liquids: Replace the 200g Ama Koji paste and 270ml milk with 300ml store-bought amazake and 170ml milk (keeping the 100ml heavy cream).

2. Check for Sweetness: Because store-bought amazake is less sweet and more diluted, taste the warm base before adding gelatin. You may want to add 1 to 2 teaspoons of honey or maple syrup to achieve the right sweetness level.