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Simple Spice Cake with a Hint of Grapefruit

"This cake is good when you don't want to make something too sweet with cream and icing and stuff. The sweetness comes from just cinnamon, sugar, and a little grapefruit. Use grapefruit slices for garnish. You can use honey with grapefruit zest instead of the powdered sugar and water if you don't like sugary glazes."

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Why it works: Cinnamon and grapefruit share more aroma than cooks usually use. They rank in the top 7% of all ingredient pairs, and 26 recipes mention both. Both carry 4-ethyl-2-methoxyphenol, which smells smoky, clove. The science ↓

The recipe

1 - 9x5 inch loaf
Prep15 min
Cook45 min

Ingredients

Contains: egg, milk, wheat (auto-detected from the ingredients and method; we can miss things, so check labels)

Directions

Method written by CompKitchen from the ingredient list. Not the original author's method, not kitchen-tested.

  1. Heat the oven to 350°F (175°C). Grease a 9x5 inch loaf pan lightly with a little of the butter, or line it with parchment.

  2. In a large bowl, beat the 1/3 cup butter with 1/2 cup white sugar until light and fluffy, about 3 minutes. Beat in the eggs one at a time.

  3. In another bowl, whisk the flour, cinnamon, nutmeg, baking powder and 1/4 teaspoon salt until evenly mixed.

  4. In a small bowl, stir together the milk and 2 teaspoons grapefruit juice.

  5. Add the dry ingredients to the butter mixture in three additions, alternating with the milk mixture, mixing gently until just combined. Do not overmix.

  6. Spread the batter evenly in the prepared pan and bake for about 45 minutes, until the top is golden and a toothpick inserted in the center comes out clean.

  7. While the cake bakes, combine 2/3 cup white sugar, 1/4 cup water, 1 tablespoon grapefruit juice and the pinch of salt in a small saucepan. Heat, stirring, until the sugar dissolves, then simmer 2 minutes.

  8. When the cake comes out of the oven, poke holes all over the top with a skewer and spoon the warm grapefruit syrup slowly over it.

  9. Let the loaf cool in the pan for 10 minutes, then lift it out onto a rack to cool completely before slicing.

By allrecipes. Recipe from Open Recipes.

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.

  1. Cinnamon + grapefruittop 7% of all pairs
    Aroma overlapstrong
    Mentioned together26 recipes

    Shared aroma: 4-ethyl-2-methoxyphenol (smoky, clove).

  2. Cinnamon + nutmegtop 1% of all pairs
    Aroma overlapstrong
    Mentioned together11,917 recipes

    Shared aroma: estragole (anise, licorice).

  3. Butter + milktop 3% of all pairs
    Aroma overlapstrong
    Mentioned together81,222 recipes

    Shared aroma: (z)-4-heptenal (biscuit, cream).

  4. Sugar + cinnamontop 4% of all pairs
    Aroma overlaplow
    Mentioned together30,777 recipes

    Shared aroma: guaiacol (smoky, sweet).

  5. Cinnamon + milktop 4% of all pairs
    Aroma overlapmoderate
    Mentioned together12,647 recipes

    Shared aroma: cuminaldehyde (Spicy, cumin).

Sugar and cinnamon share little aroma chemistry, yet 30,777 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