Name: Peptonised Milk Gruel
Ingredients: 1 cup farinaceous articles (such as oatmeal or flour); 1 cup cold milk; 2 teaspoons liquor pancreaticus; 20 grains bicarbonate of potash

Why it works: Flour and milk are a kitchen classic. They rank in the top 14% of all ingredient pairs, and cooks put them together in 78,219 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓

Peptonised Milk Gruel

Ingredients

1 cup farinaceous articles (such as oatmeal or flour)
1 cup cold milk
2 teaspoons liquor pancreaticus
20 grains bicarbonate of potash

Directions

The book gives no oven temperature. The 125°F (52°C) in the steps was added when the recipe was transcribed, as a starting point.

Make the gruel

Prepare a thick gruel from the farinaceous articles.
While the gruel is still hot, mix it with an equal amount of cold milk.

Adjust and enzymatic step

Ensure the mixture reaches a temperature of about 125°F (52°C).
Add 2 teaspoons of liquor pancreaticus and 20 grains of bicarbonate of potash to each pint of the mixture.
In winter, warm the milk to 60°F (16°C) if it is too cold.

Recipe from a historical cookbook (Internet Archive).

Transcribed from a scanned cookbook and modernised for today's kitchens. Where the book gave no heat or time, or said "a moderate oven", the temperatures and times here may be modern equivalents rather than the book's own figures.

Photo for illustrative purposes only · Contact us to use it

Explore the science

The flavor team

The pairs that carry this dish. Each one is judged two ways: how much their aromas overlap, and how often cooks already put them together.

Flour + milktop 14% of all pairs

Smell alikelow

Cooked together78,219 recipes

Shared aroma: isobutyraldehyde (malty, green).

Flour and milk barely smell alike, yet cooks put them together in 78,219 recipes: they work on texture and structure more than aroma.

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

What each ingredient does

Farinaceous articles: Provide the starch that is cooked into the thick gruel, giving the base body and texture.
Cold milk: Adds moisture and dairy richness, and cools the hot gruel to a workable temperature.
Liquor pancreaticus: Enzymes that break down starches and proteins, partly pre-digesting the mixture.
Bicarbonate of potash: Alkaline salt that raises the pH, helping the enzymes work and softening the mixture.

The step that matters

Holding the mixture at about 125°F (52°C) before adding the enzyme. Pancreatic enzymes work best near body temperature and are destroyed by strong heat. The mixture must be warm enough for the enzymes to act, but not so hot that they lose activity. Adding them to a mixture that is too hot or too cold will give poor results.

“What each ingredient does” and “The step that matters” were written by Claude from this recipe’s own method and reviewed in samples by CompKitchen.