Directions
<ol class="no-list-style"><li class="MethodStepper"><h4 class="step-title">Step 1</h4>Preheat your oven to 160°C (140°C fan/325°F). Prepare your springform pan by wrapping the outside with two layers of heavy-duty aluminum foil to prevent water from seeping in during baking. This water bath method is crucial for achieving a silky-smooth cheesecake without cracks.</li><li class="MethodStepper"><h4 class="step-title">Step 2</h4>For the base, place the digestive biscuits in a food processor and pulse until you have fine crumbs. Alternatively, place them in a ziplock bag and crush with a rolling pin. Mix the crumbs with melted butter and sugar until the mixture resembles wet sand. The butter acts as a binding agent, while the sugar adds a touch of sweetness and helps the base hold together.</li><li class="MethodStepper"><h4 class="step-title">Step 3</h4>Press the biscuit mixture firmly into the base of your prepared springform pan, using the back of a spoon or the bottom of a glass to create an even layer. Chill in the refrigerator for at least 15 minutes to set while you prepare the filling. This chilling time helps solidify the butter, creating a sturdy foundation for your cheesecake.</li><li class="MethodStepper"><h4 class="step-title">Step 4</h4>In a large bowl, beat the cream cheese on medium-low speed until completely smooth with no lumps, about 2 minutes. It's crucial to have your cream cheese at room temperature to achieve a perfectly smooth texture. Scrape down the sides of the bowl frequently during mixing to ensure even incorporation.</li><li class="MethodStepper"><h4 class="step-title">Step 5</h4>Gradually add the caster sugar and continue beating until the mixture is light and fluffy, about 2 minutes. Add the eggs one at a time, mixing well after each addition but being careful not to over-beat. Over-beating incorporates too much air, which can cause the cheesecake to rise and then crack as it cools.</li><li class="MethodStepper"><h4 class="step-title">Step 6</h4>Fold in the sour cream, vanilla extract, and lemon zest gently until just combined. The sour cream adds a subtle tanginess that beautifully complements the passion fruit, while also contributing to the creamy texture of the cheesecake.</li><li class="MethodStepper"><h4 class="step-title">Step 7</h4>Pour the cream cheese mixture over the chilled base and smooth the top with a spatula. Place the foil-wrapped springform pan in a large roasting tin and pour in hot water until it reaches halfway up the sides of the cheesecake pan. This water bath provides gentle, even heat and maintains moisture in the oven, preventing cracks.</li><li class="MethodStepper"><h4 class="step-title">Step 8</h4>Bake for 45-50 minutes until the edges are set but the center still has a slight wobble when gently shaken. The cheesecake will continue cooking from residual heat after removal from the oven. Turn off the oven, leave the door slightly ajar, and allow the cheesecake to cool in the oven for 1 hour. This gradual cooling process prevents the dramatic temperature change that can cause cracks.</li><li class="MethodStepper"><h4 class="step-title">Step 9</h4>Remove from the oven and water bath, carefully peel off the foil, and let the cheesecake cool completely at room temperature. Cover and refrigerate for at least 4 hours, preferably overnight. This chilling time allows the flavors to develop and the texture to set perfectly.</li><li class="MethodStepper"><h4 class="step-title">Step 10</h4>For the passion fruit topping, cut the passion fruits in half and scoop out the pulp into a bowl. Reserve a few teaspoons of seeds for decoration if desired, then press the remaining pulp through a fine mesh sieve to separate the juice from the seeds. You should have approximately 120-150ml of juice.</li><li class="MethodStepper"><h4 class="step-title">Step 11</h4>In a small saucepan, whisk together the passion fruit juice, sugar, cornflour mixed with water, and lemon juice. Heat over medium heat, stirring constantly, until the mixture comes to a boil and thickens, about 3-4 minutes. The cornflour acts as a thickening agent, creating a glossy, spoonable consistency.</li><li class="MethodStepper"><h4 class="step-title">Step 12</h4>Remove from heat and allow to cool for 15 minutes. The mixture will continue to thicken as it cools. Pour the passion fruit topping over the chilled cheesecake, spreading it evenly with a spatula. Sprinkle with the reserved passion fruit seeds if using. Return to the refrigerator for at least 30 minutes to set the topping.</li><li class="MethodStepper"><h4 class="step-title">Step 13</h4>To serve, run a thin knife around the edges of the springform pan before releasing the catch. For clean slices, dip your knife in hot water and wipe dry between cuts. Your passion fruit cheesecake is now ready to impress with its beautiful balance of creamy richness and tropical tanginess!</li></ol>