Determining sugar content of liqueurs
My girlfriend and I have been experimenting with making different flavors of chocolate truffles. One difficulty with this is that different flavorings have different amounts of sugar, meaning we need to adjust the amount of other sweetening in the truffle to keep it from being overly sweet or bitter (usually by changing the ratio of unsweetened to semisweet chocolate). Obviously getting the sweetness exactly right is going to take some experimentation, but we'd like to be able to start by making the total amount of sugar in each truffle the same, no matter what flavor it is.
We can figure out approximately how sweet most flavorings are are by using their "Nutrition Facts" labels. Unfortunately, alcoholic drinks don't come with these labels, which means we need a different strategy for liqueur-flavored truffles. Neither of us drinks very much alcohol, so we don't have a very good intuition for which potential flavors might be sweeter. Googling gives several sites with widely varying numbers, and I don't know which ones to trust. For example, this site claims an ounce of Kahlua has 11.2 g of sugar, while this site claims it's 15 g.
Is there a good way to determine how much sugar is in a given liqueur? Ideally, I would like either a pointer to a reliable source, or a simple experiment I could do myself to determine sugar content.
Best Answer
What you need is a refractometer, also known as a Brix meter. They can be quite inexpensive. Brix is essentially sucrose in baker's percentages, so 1 gram of sugar in 100 grams of water is 1 brix. You just need to choose a model that measures in the range you are interested in. Here are some on Amazon.
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How do you test for sugar in alcohol?
In general, liqueurs must contain at least 100g of sugar per litre. For cherry liqueurs, however, the minimum is 70g / litre and for gentian liqueurs it is 80 g / litre. Some other categories of liqueur have a higher minimum sugar content.How much sugar must a liqueur contain?
Liqueurs are made by mixing alcohol and sugar. In fact, to be called as such, a liqueur has to be at least 2.5 percent sugar by weight. They range in sweetness and in sugar content, but most are very high in sugar.Is liqueur high in sugar?
Take the volume of the spirit in liquid measure (fluid oz, cups, ml) and multiply it by the percentage of alcohol by volume. Divide that amount by 100. That will be the liquid measure of ethanol in your base.Chem 1A Labs, Determination of Sugar Content in Commercial Beverages
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