Real Ingredients, Real Imperfections: Understanding Bloom on Chocolate
Why is my dark chocolate white?
A few weeks ago we got a message from a sweet regular. She orders frequently and was going through our dark chocolate Leaflets at a steady clip. We'd recently made a delivery and left it on her front porch, in a paper bag, in the midst of a cold snap.
When she opened her bag of chocolates she was kind enough to send us the photo (now memorialized) at the top, right of this page.
For us: devastation.
For her: is this normal?
God bless her for sending that photo!
If you’ve ever had a similar little moment of panic, you are not alone!
What we've learned since then has been a game changer and has led us here, where we're talking about what chocolate bloom is, why it shows up, and everything else chocolate bloom related—including whether it's safe to eat.
What is chocolate bloom?
Chocolate bloom is the term for the white or grayish film, spots, or faint streaks that sometimes show up on the surface of chocolate. It can make dark chocolate look a bit dusty, streaky, or mottled instead of shiny and uniform.
There are two main types of bloom on chocolate:
- Fat bloom – when cacao butter (the natural fat in chocolate) softens and moves, then re‑crystallizes on the surface after a temperature swing.
- Sugar bloom – when moisture hits the chocolate (for example, from condensation), dissolves a bit of sugar, and then dries, leaving a new pattern on top.
In everyday language:
Bloom is mostly a surface change in texture and appearance, not a sign that the chocolate has gone bad or grown something scary.
The chocolate inside is still... chocolate.
Why you might see bloom on chocolate
We make artisan dark chocolate with a high fat content.
We sweeten our dark chocolate with honey.
Our dark chocolate has only five clean (non-chemically processed), natural ingredients.
The point is: we don’t add stabilizers or “mystery” ingredients to force every piece of chocolate to look perfect.
That means a few important things:
- There’s a lot of real cacao butter present, which can move and re‑settle if temperatures swing.
- There are no heavy stabilizers or waxy coatings whose main job is to keep chocolate picture‑perfect through rough handling.
- Our chocolate behaves like real food, not something engineered to survive unnatural circumstances.
In real life, that looks like:
- Chocolates riding along in FedEx or UPS delivery trucks where temperatures frequently cycle through warm ups and cool downs as the drivers make their stops, open doors, etc.
- Chocolates that muster the cold, or heat, based on where we leave them when we make home deliveries.
Those temperature changes are exactly the kind of thing that can trigger bloom on otherwise safe chocolates, especially on high‑fat, natural dark chocolate like ours.
Considering we left our customer's chocolates outside on the porch, on a particularly cold day, in an uninsulated bag, we think the huge temperature swing had a lot to do with the outcome when she moved her order inside and unwrapped some Leaflets.
Preventing Bloom on Chocolate
Once chocolates leave our hands, customers can play a key role in protecting it.
Leaving a cooler out for deliveries helps shield chocolates from extreme temperature changes, whether it’s freezing winter air or blazing summer heat.
While our main products are perishable produce, the simple step of leaving out a cooler for your Back Mountain Microgreens delivery can make a big difference in keeping your chocolates looking their best too. At first we didn't think the cooler mattered so much for chocolates, but now we know it's a safe bet!
We've also taken steps to prevent bloom on our artisan dark chocolates starting in-house, with the care we take during production.
We started making chocolate without any experience. What that meant in the beginning was really inconsistent batches. We've got quite a few batches in now though, and repetition has helped us improve our consistency compared to when we first began. Thanks to this bloom incident, we also dove into the science of making chocolate and are now acutely aware of just how important precision measuring is.
It's like the difference between cooking a meal, and baking a dessert. Cooking is relatively lenient. Baking is a science! Chocolate making is much more akin to baking—it is an exercise in precision. One misstep, and the whole batch is done for!
At least now we know that, and we pay close attention to temperatures at each stage of our process to make sure we achieve a solid temper, which reduces the likelihood of fat bloom caused by temps drifting during production.
Regardless, if we do all we can on the production end, and you do all you can on the receiving end, there may still be instances where bloom gets the best of us.
The real issue is: can you eat it?
Is bloom on chocolate safe to eat?
Behind the scenes, we've tested our chocolate for water activity (AW)—basically, how much available water there is for microbes to grow.
- Our most recent independent third party reading came back at 0.433 AW.
- That number puts our chocolate in a low‑moisture, shelf‑stable category that does not require an official expiration date under typical guidelines.
In simple terms:
Our process ensures there is not enough available water in the chocolate for concerning bacteria to grow.
That is great news, all on its own!
What it means is, if you see bloom on our chocolates, it's most likely a cosmetic surface blemish, not a food‑safety issue.
The bloom may slightly change the texture—the surface may feel a bit more powdery—but it likely doesn’t mean the chocolate is unsafe.
Practical takeaways: how to store chocolate to reduce bloom
You can’t control everything, but you can stack the deck in your favor. Here are some simple, practical tips for keeping your chocolates (or your greens) in great shape:
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Leave out a well insulated cooler for delivery
- Whether for us, FedEx, or UPS, give your delivery driver a protected spot to make their drop.
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Bring your order inside soon after delivery.
- Avoid letting it camp outside any longer than necessary.
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Store your chocolates in a cool, dry place.
- A cupboard away from the stove and away from direct sun works well.
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Avoid big temperature swings.
- Try not to move chocolate in and out of the fridge or freezer.
What do I do with chocolate that has already bloomed
If you unwrap a piece of dark chocolate and see that light, pebbly, dusty look, here are some options:
- Enjoy it as‑is. The flavor is still rich and chocolaty; the appearance just looks different.
- Melt it for baking or hot chocolate. The bloom will disappear once the chocolate is melted and reused in brownies, bark, sauces, or drinks.
- Break it into pieces for toppings. Use bloomed chocolate as chips or shavings on ice cream, yogurt, or desserts where you won’t notice the surface as much.
The big idea is this:
Bloom is not a danger sign—it’s a harmless outcome when real ingredients meet real‑life temperatures.
Why we embrace real ingredients (even with occasional bloom)
We choose to make chocolate that is:
- High‑fat and dark, with cacao butter you can actually taste.
- Sweetened with honey, not a long list of syrups and sweeteners.
- Built from only five high‑quality, natural ingredients, not an ingredient list that reads like a science experiment.
That kind of recipe means our chocolates are more susceptible to bloom due to our choice to forego the stabilizers and preservatives often found in mass-produced chocolate.
Now, we accept this realistic imperfection (if it occurs), because we chose to prioritize:
- Ingredients we feel good about feeding our own family.
- Products that focus on nutrient density, quality, and integrity, not just cosmetics.
- A relationship with customers built on trust and clear education, not confusion and fear.
The good news is, we haven't heard from any other customers about this issue.
Maybe they're just staying quiet, or maybe honing in our production process and nailing down our delivery strategy has paid off.
If bloom does show up on your chocolate, take a deep breath.
Remember what you’ve learned here, and feel free to enjoy or repurpose those pieces with confidence.
Why share the chocolate bloom photo?
Our mission is to give to, and serve, our local community. We're able to do that by offering you healthy, high-quality products derived from the crops we grow in our year-round indoor grow room.
The schtick is: we can only accomplish our mission when our products actually are high-quality because that's when you enjoy them!
If you are at all disappointed as opposed to thrilled with the quality of our chocolate—particularly because it has bloomed—please, reach out to us, so we can do better for ourselves, for you, and for our community!
