Why it works: Sugar and chocolate are a kitchen classic. They rank in the top 13% of all ingredient pairs, and 15,404 recipes mention both. Both carry guaiacol, which smells smoky, sweet. The science ↓
Congo Chewies
Ingredients
Directions
Make the batter
Combine melted margarine and brown sugar.
Mix in the rest of ingredients.
Bake and serve
Pour into a greased 9x13 pan.
Bake at 350°F for 20-25 minutes.
Cool, cut into 2-inch squares.
This recipe comes from the Recipes Wiki on Fandom and is licensed CC BY-SA 4.0. Our formatting and summaries are shared under the same licence.
Steps grouped into stages for easier reading; the method is the source's own.
Explore the science
The flavor team
The pairs that carry this dish. Each one is judged two ways: how much aroma chemistry they share, and how many recipes mention both.
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Sugar + chocolatetop 13% of all pairsAroma overlapmoderateMentioned together15,404 recipes
Shared aroma: guaiacol (smoky, sweet).
-
Sugar + flourtop 15% of all pairsAroma overlapmoderateMentioned together92,116 recipes
Shared aroma: phenylacetaldehyde (hawthorne, honey).
-
Egg + flourtop 15% of all pairsAroma overlaplowMentioned together106,462 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Flour + chocolatetop 18% of all pairsAroma overlaplowMentioned together8,994 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Sugar + eggtop 21% of all pairsAroma overlapmoderateMentioned together122,807 recipes
Shared aroma: 2-nonenal (fatty, green).
Egg and flour share little aroma chemistry, yet 106,462 recipes mention both: they likely 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
- Eggs
- Bind the batter and help set the bars into a chewy structure as they bake.
- Margarine
- Adds fat that keeps the bars moist and tender.
- Brown sugar
- Adds sweetness and moisture, contributing to the chewy texture.
- Flour
- Provides the structure that holds the bars together as they bake.
- Baking powder
- Releases gas during baking to give the bars lift.
- Semi-sweet chocolate chips
- Add melted pockets of chocolate flavour throughout the bars.
The step that matters
Bake at 350°F for 20-25 minutes. Baking time decides the texture. Underbaked bars stay gooey in the centre, while overbaked bars turn dry and firm. Check for set edges and a lightly browned top.
“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.
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