Alcohol does not fully “burn off” or “cook out” during cooking. Even after two and a half hours of simmering, roughly 5% of the original alcohol remains in the dish. The widespread belief that heat eliminates all alcohol is one of the most persistent myths in home cooking, and the actual retention rates may surprise you.
Why Alcohol Doesn’t Fully Evaporate
Pure ethanol boils at 78.5°C (about 173°F), well below water’s boiling point of 100°C (212°F). This leads many people to assume that once a dish hits a simmer, the alcohol simply evaporates while the water stays behind. But alcohol in cooking is never pure. It’s dissolved in water and mixed with fats, sugars, and proteins that all interact with it.
When ethanol and water mix, they form what chemists call an azeotrope: a blend that behaves almost like a single substance. An ethanol-water mixture boils at 78.2°C, and the vapor that rises off the pot contains both ethanol and water in a nearly fixed ratio. You can’t selectively boil away just the alcohol and leave everything else behind. As the dish simmers, alcohol concentration drops gradually, but some amount binds to other molecules in the food and resists evaporation entirely.
How Much Alcohol Stays in Your Food
The USDA maintains a table of nutrient retention factors that includes alcohol. For dishes that are stirred and baked or simmered, here’s what remains of the original alcohol content:
- 15 minutes of cooking: 40% remains
- 30 minutes: 35% remains
- 1 hour: 25% remains
- 1.5 hours: 20% remains
- 2 hours: 10% remains
- 2.5 hours: 5% remains
These numbers apply to dishes where the alcohol is mixed into a liquid and simmered, like a wine-based stew or a bourbon sauce that reduces on the stove. The key variable is time. A quick pan deglaze with wine, where the liquid hits a hot pan and sizzles for a minute or two, retains the majority of its alcohol. A beef bourguignon that simmers for hours gets close to zero, but never quite reaches it.
The cooking method matters too. A flambé looks dramatic, but the brief flash of flame only burns off about 25% of the alcohol. Dishes baked in the oven without a lid lose alcohol faster than covered pots because the vapor can escape. A sauce spread thin across a wide pan evaporates more quickly than the same volume in a deep, narrow pot, since surface area determines how fast molecules can escape into the air.
What This Means in Practical Terms
For most adults eating a typical serving, the residual alcohol in a well-cooked dish is minimal. Consider a stew that starts with one cup of red wine (roughly two glasses’ worth of alcohol) and simmers for two hours. Only about 10% of that alcohol remains, distributed across several servings. Each portion might contain the equivalent of a fraction of a teaspoon of pure alcohol. That’s not enough to produce any noticeable intoxication in a healthy adult.
But “not enough to feel drunk” isn’t the same as “zero alcohol.” The distinction matters for certain groups of people. If you’re cooking for children, you’re likely fine with a long-simmered dish, but a quick sauce finished with brandy is a different story. For pregnant individuals who choose to avoid alcohol completely, it’s worth knowing that even a two-hour simmer leaves a measurable trace.
A Real Concern for People in Recovery
For anyone managing an alcohol use disorder, foods cooked with alcohol carry a risk that has nothing to do with intoxication. Even a small amount of alcohol present in food can act as a trigger for relapse. The taste itself, the aroma during cooking, or simply the knowledge that alcohol is in the dish can be enough to activate cravings.
Addiction treatment professionals generally recommend that people in recovery avoid cooking with alcohol altogether and skip dishes prepared with it when eating out. Some people in recovery can eat these foods without any issue, particularly when they don’t realize alcohol was used. But many find it puts their sobriety at risk, and the safest approach is to ask about preparation methods at restaurants or request that no alcohol be used. The same applies to baking: vanilla extract, rum cakes, and bourbon-glazed desserts all retain some alcohol and can present the same triggering effect.
Substitutes That Work
If you want the flavor contribution of alcohol without the alcohol itself, your options depend on what the recipe is trying to achieve. Wine in a braise adds acidity and depth. You can get similar results from a combination of broth and a splash of vinegar or citrus juice. Beer in a batter creates lightness through carbonation, so sparkling water or non-alcoholic beer works as a swap. Brandy or bourbon in desserts provides warm, caramelized notes that are harder to replace, but vanilla extract (which itself contains some alcohol) or maple syrup can get you partway there.
Non-alcoholic wines and beers have improved significantly and work well in cooking, since you’re after the flavor compounds rather than the alcohol itself. These products typically contain less than 0.5% alcohol by volume, comparable to what remains in a long-simmered dish made with the real thing.