This elegant Key Lime Cheesecake Tart will quickly become a favorite at your family table. It strikes a perfect balance between tart and sweet: a thick graham cracker crust, a creamy New York-style cheesecake layer, a tangy key lime cream layer, and a cloud of whipped cream finished with bright lime zest.

Why this Key Lime Cheesecake Tart is the best
This southern-inspired dessert becomes unforgettable when the chilled creamy cheesecake meets a bright key lime topping. The contrast of the buttery graham-cracker crust, the dense New York-style cheesecake, and the tangy lime cream is pure delight. The tart is baked in an 8-inch tart pan for an attractive wavy edge, but the recipe also works in a 9-inch springform pan. It’s perfect for holidays and celebrations like Easter, Mother’s Day, or birthdays.

Ingredients for Key Lime Cheesecake Tart
- Graham cracker crumbs – the base for the crust; store-bought crumbs save time.
- Granulated sugar – sweetens the crust and the cheesecake filling.
- Unsalted butter – binds the crust after melting.
- Cream cheese – use brick-style cream cheese, softened to room temperature.
- Eggs – add richness and structure to the cheesecake filling.
- Vanilla extract – enhances flavor.
- All-purpose flour – helps stabilize the filling.
- Sweetened condensed milk – used to make the key lime cream.
- Lime juice and zest – provide the tart key-lime flavor.
- Heavy whipping cream (35% fat) – for the whipped cream topping.
- Powdered sugar – sweetens the whipped cream topping.

Expert tips
Room-temperature ingredients – For the creamiest cheesecake, bring all filling ingredients to room temperature (except the whipping cream, which should be chilled before whipping).
Smooth cream cheese – Beat softened cream cheese until smooth and lump-free before adding sugar and eggs. A whisk or paddle attachment works best to achieve a light, even texture.
Use a hand blender if needed – If small lumps remain, briefly use an immersion blender to smooth the filling, but avoid over-blending.

How to make the perfect Key Lime Cheesecake Tart
The process is straightforward: prepare and bake the crust, make and bake the cheesecake filling, add the key lime cream, then chill and top with whipped cream. The step-by-step instructions below will guide you.
Step 1 – Graham cracker crust
Make the crust: Combine graham cracker crumbs, sugar, and melted butter. Press the mixture into an 8-inch tart pan (I used one with a 2-inch edge). If you’re unsure about your tart pan, line the bottom with parchment paper and lightly butter the edges; skip this if your pan is non-stick.
Bake: Preheat the oven to 350°F (180°C) and bake the crust 5–8 minutes. Watch closely to avoid burning. Let the crust cool while you prepare the filling.
Step 2 – Cream cheese filling
Prepare the filling: Beat softened cream cheese until smooth. Add sugar and mix until combined. Add eggs one at a time, then stir in vanilla and flour. Pour the filling into the cooled crust and smooth the top.
Step 3 – Key lime filling
Make the key lime cream: Whisk together sweetened condensed milk, egg yolks, and lime juice until smooth. Gently pour the lime mixture over the cheesecake layer; the heavier cheesecake layer will support the lime cream without it sinking.

Step 4 – Bake the tart
Bake: Bake at 350°F (180°C) for about 35 minutes, or until the center is set and only jiggles slightly. Cool the tart for 20 minutes, then chill in the refrigerator at least 6 hours or preferably overnight. Chilling overnight ensures a clean slice and a properly set texture.
Step 5 – Toppings and garnish
Whip the cream: Use chilled heavy cream (35% fat) and whip until soft peaks form. Add powdered sugar and vanilla, then whip to stiff peaks.
Pipe and finish: Transfer the whipped cream to a piping bag fitted with a round tip and pipe dollops over the chilled tart. Finish with a sprinkle of fresh lime zest.


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KEY LIME CHEESECAKE TART
Equipment
- Tart pan, 8-inch (or 9-inch springform pan)
Ingredients
Crust
- 2 cup (170 g) graham cracker crumbs
- 2/3 cup (150 g) granulated sugar
- 7 tbsp (105 g) unsalted butter, melted
Cream Cheese Filling
- 2 bricks (450 g) cream cheese, softened
- 1/3 cup (65 g) granulated sugar
- 2 large eggs
- 1 1/2 tsp vanilla extract
- 1 tbsp all-purpose flour
Key Lime Cream
- 1 can (397 ml) sweetened condensed milk
- 4 large egg yolks
- 1/2 cup (125 ml) lime juice (about 6 medium limes)
Whipped Cream Topping
- 2 cups (500 ml) heavy cream (35% fat minimum)
- 2 tbsp (30 g) powdered sugar
- 1 tsp (15 ml) vanilla extract
- 1 small lime, zested
Instructions
Graham cracker crust
- Preheat oven to 350°F (180°C). Line the bottom of the tart pan with parchment and lightly butter the sides if needed.
- Mix graham crumbs, sugar, and melted butter. Press into the tart pan and bake 5–8 minutes. Cool completely.
Cream cheese filling
- Beat the cream cheese until smooth, add sugar and combine. Add eggs one at a time, then vanilla and flour. Pour into the cooled crust and level with a spatula.
Key lime filling and baking
- Whisk condensed milk, egg yolks, and lime juice until smooth. Gently pour over the cheesecake layer and level the top.
- Bake at 350°F (180°C) for about 35 minutes, until set with a slight jiggle in the center. Cool 20 minutes, then refrigerate at least 6 hours or overnight.
Toppings
- Whip chilled heavy cream to soft peaks. Add powdered sugar and vanilla, then whip to stiff peaks.
- Pipe dollops over the chilled tart and finish with lime zest.
Notes
- Store the cheesecake in an airtight container in the refrigerator for up to 5 days, or freeze for up to 3 months.
- For the best texture and ease of slicing, bake the day before serving and chill overnight.
- Bring filling ingredients to room temperature for a smoother batter; keep the whipping cream chilled.
- Use an 8-inch tart pan for a decorative edge or a 9-inch springform pan if preferred.
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