Homemade Lemonade Powder: Sugar and Citric Acid Ratio per Litre

Short answer: a homemade lemonade powder needs about 100 g of sugar and 3 g of citric acid per litre of finished drink. Mix 1 kg of granulated sugar with 30-40 g of citric acid and you have powder for 10 litres: about 26 g per 250 mL glass.

The ratio is not arbitrary. Prepared lemonade in the USDA FoodData Central database contains about 10.4 g of carbohydrate per 100 g, and lab measurements of commercial lemonades found between roughly 1 and 7.4 g of citric acid per litre. A mix of 100 g of sugar and 2-4 g of citric acid per litre sits in the middle of both. This guide gives the batch table, the mixing steps and how to tune it.

How much sugar and citric acid per litre of lemonade?

For reference, 100 g of granulated sugar is half a cup (USDA lists 1 cup at 200 g). The 2-4 g/L citric acid range matches the starting point for still lemonade in our citric acid dosage guide for beverages.

How does that compare with fresh lemon juice?

Fresh lemon juice contains about 1.44 g of citric acid per fluid ounce, or roughly 48.7 g per litre (Penniston et al., 2008). So 3 g of citric acid powder delivers about the same acidity as 60 mL of fresh lemon juice, the juice of one or two lemons. The same study measured ready-to-drink and powdered lemonades at 0.03-0.22 g per ounce, which works out to about 1-7.4 g per litre.

What citric acid powder does not bring is lemon aroma. It gives the sourness, cleanly and consistently, but the "lemon" taste comes from the oils in the peel. That is why most homemade mixes add a flavour source (see below).

How do you make a 10-litre batch of powder?

1. Weigh 1,000 g of granulated sugar and 30 g of citric acid (or 40 g for a tart version). Use a scale that reads to 0.1 g for the acid.
2. Combine in a dry bowl and whisk for a full minute so the acid crystals are spread evenly through the sugar. Uneven mixing is the main reason one glass tastes sharper than the next.
3. Add flavour if you want, such as finely grated, fully dried lemon zest, or a small amount of acerola powder for a fruity note and a pale pink tint. Add a little at a time and taste.
4. Transfer to an airtight jar and label it with the date and the dose: "26 g per 250 mL" or "103 g per litre".
5. To serve, stir 26 g into 250 mL of cold water (or 103 g into 1 L) until dissolved, then taste and adjust.

How do you adjust the recipe?

• Too sour: drop to 20-25 g of citric acid per kilogram of sugar, or use more water per glass.
• Too sweet: raise the acid toward 40 g per kilogram rather than cutting sugar alone. Sugar and acid mask each other, so balance moves both.
• Less sugar: if you replace part of the sugar with a high-intensity sweetener, reduce the acid as well, since the sourness becomes more noticeable without sugar's body. Re-balance by taste.
• Sparkling version: dissolve the powder in a little still water first, then top up with cold sparkling water. Carbonation adds its own bite, so start at the mild ratio.
• Bigger batch: keep the ratio. For 50 litres: 5 kg of sugar and 150-200 g of citric acid.

How do you keep the powder from caking?

Both sugar and citric acid absorb moisture from the air, and citric acid in particular will clump a mix that sits open in a humid kitchen. To keep it free-flowing:

• Store it in a well-sealed glass or plastic jar, away from the kettle, dishwasher and stove.
• Use a dry spoon every time; one wet scoop starts the clumping.
• Only add zest once it is completely dry, since fresh zest brings moisture into the jar.
• If the mix forms soft lumps, break them up and re-whisk: the ratio has not changed.

Sources

• Penniston KL et al., 2008 — Quantitative assessment of citric acid in lemon juice, lime juice, and commercially-available fruit juice products: 1.44 g/oz in fresh lemon juice; 0.03-0.22 g/oz in lemonades.
• USDA FoodData Central — Lemonade, prepared with water: 10.4 g of carbohydrate per 100 g.
• USDA FoodData Central — Sugars, granulated: 1 cup = 200 g.

LiquidShop supplies food-grade citric acid, granulated sugar and acerola powder from Canadian stock. Formats and specifications are on the citric acid product page.