Introduction
and bursting with that unmistakable key lime flavor. It’s the perfect dessert when you want something that feels elegant but still
comforting: a golden cake with a fine crumb, a sweet-tart lime glaze that soaks into the top, and just enough zing to keep every bite
from feeling heavy.
Pound cake can be simple, but it’s also a recipe where small details matter. The “regulations” for a truly unforgettable key lime pound cake are:
use room-temperature ingredients for a smooth batter, cream the butter and sugar long enough to trap air (for a tender crumb),
add eggs gradually so the batter doesn’t break, and measure flour correctly so the cake stays moist instead of dry.
For the key lime flavor to shine, you need both zest (for aroma) and juice (for tang),
plus a glaze that seals in moisture and makes the cake taste like it came from a bakery.
This cake is perfect for spring and summer gatherings, holidays, brunch tables, and “slice-and-share” moments.
It also stores beautifully—pound cake often tastes even better the next day. If you love key lime pie, you’re going to love this pound cake version:
same bright citrus vibe, but in a buttery, sliceable, crowd-friendly form that’s easy to transport and even easier to fall in love with.
Ingredients
For the pound cake
- 1 cup (226 g) unsalted butter, softened (room temperature)
- 2 1/2 cups (500 g) granulated sugar
- 5 large eggs, room temperature
- 3 cups (360 g) all-purpose flour
- 1/2 tsp baking powder (optional, slightly lighter crumb)
- 1/2 tsp salt
- 1 cup (240 ml) buttermilk, room temperature
- 1/3 cup (80 ml) key lime juice (bottled or fresh)
- 2 tbsp key lime zest (about 4–6 key limes, or 2–3 Persian limes)
- 1 tsp vanilla extract (yes—vanilla enhances citrus)
- 1/2 tsp lime extract (optional, boosts flavor)
For the key lime glaze
- 2 cups powdered sugar
- 3–4 tbsp key lime juice
- 1 tbsp melted butter (optional, makes glaze silky)
- 1 tsp key lime zest (optional)
- Pinch of salt (balances sweetness)
Optional garnish
- Extra lime zest
- Thin lime slices
- White chocolate curls
Ingredient notes: Key limes are smaller and more aromatic than regular limes, but bottled key lime juice works well
(and is common in key lime desserts). Buttermilk adds tenderness and a slight tang that pairs beautifully with lime.
