How to Make a Sour Citric Acid Coating and Flavor Your Gummies

The sour coating on a gummy is the easiest part of the whole process to get right and the easiest to ruin. Get it right and you have a crisp, tart shell that stays dry in the jar. Get it wrong and by morning every gummy is sweating in a syrupy puddle. We coat our own house gummies with plain citric acid and sugar, and this is the exact ratio, timing and storage we use, plus how we flavor the batch in the first place. For adults 21 and over.

What you need

• Food grade Citric acid, fine crystalline
• Granulated sugar, the finer the better. Caster sugar is ideal
• Tapioca starch for a dusting coat
• A finished batch of set gummies. Ours are pectin gummies made with a weighed amount of Blue Lotus Extract Powder 100:1
• A wide bowl, a wire rack, a kitchen scale and an airtight jar
• Optional: food grade flavor extract or concentrated fruit juice for the batch itself

Molds, pectin, tapioca starch and the other gummy supplies are in the Accessories and DIY Supplies collection.

Flavoring the batch before it sets

Flavor goes in at the end, after the pot comes off the heat, because heat cooks off the volatile parts of most extracts. For a 500 g batch of gummy base we stir in 2 to 4 ml of flavor extract, or replace up to 15 percent of the water with concentrated fruit juice. Taste the warm liquid. It will taste about 20 percent stronger once it cools and sets, so stop a little short.

Tartness inside the gummy also comes from citric acid. Dissolve 5 to 8 g of citric acid in an equal weight of warm water and stir it in during the last 30 seconds before pouring. In a pectin gummy this step also triggers the set, so it always goes in last and you pour immediately.

Drying before you coat

This is the step people skip. A gummy straight out of the mold has a damp surface. Coat it now and the sugar dissolves into that moisture and the acid pulls even more water out of the gummy, which is where the puddle comes from.

1. Unmold the gummies onto a wire rack in a single layer, not touching.
2. Leave them uncovered at room temperature for 24 to 48 hours. In humid weather run a fan across the rack.
3. They are ready when the surface feels dry and slightly tacky, not wet, and each gummy has lost a little weight and firmed up.

The sour coating ratio

We use 2 parts sugar to 1 part citric acid by weight. For a batch of about 50 gummies that is 40 g sugar and 20 g citric acid. That ratio gives a clear sour hit without the coating tasting like a chemistry set. If you want milder, go 3 to 1. Anything sourer than 1 to 1 pulls too much moisture and the coating melts within a day.

Coating, step by step

1. Toss the dried gummies in 1 tablespoon of tapioca starch first, then shake off the excess in a sieve. This dry base layer helps the sour coat stick and keeps it from dissolving.
2. Mix the sugar and citric acid in the wide bowl. Break up any lumps with your fingers.
3. Add gummies 10 or 12 at a time and toss until every side is covered. Do not let them sit in the bowl.
4. Lift them out with a slotted spoon, tap off the loose coating, and return them to the wire rack.
5. Let the coated gummies rest another 4 to 6 hours before jarring so the coating sets into the surface.

Storing coated gummies

Airtight glass jar, a 1 g desiccant pack tucked under a square of parchment, cool cabinet. Do not refrigerate. Condensation forms every time you open a cold jar and the coating dissolves. Coated gummies keep their crunch for 2 to 3 weeks this way. If they do start to weep, spread them on the rack for a day, then re-toss in a fresh 2 to 1 mix.

Keeping the botanical amount consistent

The coating adds flavor, not extract, so the amount of botanical per gummy is set at the pour. We weigh the extract for the whole batch on a milligram scale, blend it into the base for 2 full minutes, and divide the batch weight by the number of gummies poured so each one carries a known, small amount. Write that number on the jar label with the date. Start with fewer than you think you want and keep notes.

Disclaimer. For adults 21 and over. These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Traditional use of a botanical does not establish that it will produce any particular result. Keep out of reach of children.