Ruby Red Grapefruit Glazed Angel Food Cake
Light and airy angel food cake infused with bright ruby red grapefruit zest and topped with a tangy grapefruit glaze. This citrus-forward dessert combines the classic fluffy texture of angel food cake with the refreshing flavor of ruby red grapefruit, making it perfect for spring and summer gatherings. The superfine sugar and careful folding technique create an exceptionally tender crumb, while the grapefruit juice glaze adds moisture and intensifies the citrus notes without overwhelming the delicate cake structure.
Ingredients
- 1 ¾ cups superfine sugarregular granulated sugar1:1gluten-freebudget
may affect texture slightly
- 1 cup + 2 TBSP cake flourall-purpose flour minus 2 TBSP plus 2 TBSP cornstarch1:1gluten-freebudget
standard substitution
Full guide → - ¼ tsp salt
- 12 large egg whites, at room temperature
- 1 ½ tsp cream of tartar
- 1 tsp vanilla extract
- zest of one ruby red grapefruitregular grapefruit or orange1:1seasonalavailability
different flavor profile
- 3 TBSP unsalted butter, at room temperature
- 1 ½ cups powdered sugar
- ⅓ cup ruby red grapefruit juiceregular grapefruit or orange1:1seasonalavailability
different flavor profile
Instructions
- 1
Adjust oven rack to lower middle position and preheat oven to 325°F
- 2
Whip egg whites and cream of tartar together on medium-low until foamy
- 3
Switch to medium-high and slowly add sugar one tablespoon at a time
- 4
Whip until soft peaks form
- 5
Add vanilla extract and grapefruit zest and beat just until incorporated
- 6
In 3 additions, slowly sift flour mixture into egg white mixture using fine mesh strainer, gently folding with rubber spatula after each addition
- 7
Pour and spread batter into ungreased tube pan and shimmy pan on counter to smooth surface
- 8
Bake until toothpick inserted comes out clean, rotating pan halfway through baking
- 9
Remove from oven and cool cake completely upside-down on wire rack
- 10
Run thin knife around edges and gently tap pan on counter until cake releases
- 11
Whisk all glaze ingredients together and drizzle over cake
Tips
Use superfine sugar for better dissolution into the egg whites, creating a smoother meringue base
Cool the cake completely upside-down to maintain its height and prevent collapse from gravity
Sift the flour mixture in three separate additions and fold gently to avoid deflating the delicate egg white structure
Good to Know
Cover and store at room temperature for up to 3 days
Can be made 1 day ahead without glaze, wrap in plastic wrap
Best served at room temperature within a few hours of glazing
Common Mistakes
Use room temperature egg whites to avoid dense texture
Don't skip the upside-down cooling to prevent collapse
Fold flour gently to avoid deflating the meringue
Substitutions
Gluten-Free Swaps
standard substitution
Full guide →may affect texture slightly
General Alternatives
different flavor profile
FAQ
Can I use regular sugar instead of superfine?
Yes, but superfine sugar dissolves more easily into the egg whites. If using regular sugar, process it briefly in a food processor to make it finer.
What if I don't have a tube pan?
A tube pan is essential for angel food cake as it helps the cake climb and maintain structure. A bundt pan won't work as well due to the different shape.
How long will this cake keep fresh?
The cake stays fresh for up to 3 days covered at room temperature. The glaze may absorb slightly into the cake over time.