Directions
<ol class="no-list-style"><li class="MethodStepper"><h4 class="step-title">Step 1</h4>Preheat your oven to 160°C (325°F) fan-forced. Wrap the outside of your springform pan with a double layer of heavy-duty aluminum foil, ensuring it comes at least 5cm up the sides. This prevents water from seeping into your cheesecake during baking in the water bath.</li><li class="MethodStepper"><h4 class="step-title">Step 2</h4>For the crust, pulse the digestive biscuits and pistachios in a food processor until finely ground. The pistachios should be well incorporated but still provide subtle texture. Add the melted butter, sugar, and salt, then pulse until the mixture resembles wet sand and holds together when pressed.</li><li class="MethodStepper"><h4 class="step-title">Step 3</h4>Press the crust mixture firmly into the bottom and about 2-3cm up the sides of your prepared springform pan. Use the bottom of a measuring cup to create an even, compact layer. Bake for 10 minutes until lightly golden and set. Remove and let cool while preparing the filling. Keep the oven on.</li><li class="MethodStepper"><h4 class="step-title">Step 4</h4>In a stand mixer fitted with the paddle attachment, beat the cream cheese on medium-low speed until completely smooth with no lumps, about 2 minutes. Scrape down the sides and bottom of the bowl thoroughly. Proper mixing at this stage is crucial for avoiding cracks and lumps.</li><li class="MethodStepper"><h4 class="step-title">Step 5</h4>Add the sugar and beat for another 2 minutes until well incorporated and the mixture is silky smooth. Keep the mixer on medium-low speed to avoid incorporating too much air, which can cause the cheesecake to rise too much then crack during cooling.</li><li class="MethodStepper"><h4 class="step-title">Step 6</h4>Add eggs one at a time, mixing just until each is incorporated before adding the next. Scrape down the bowl after each addition. Then add the sour cream, pistachio paste, and vanilla, mixing until just combined. Finally, sprinkle in the flour and mix until incorporated.</li><li class="MethodStepper"><h4 class="step-title">Step 7</h4>Pour the filling onto the cooled crust. Tap the pan gently on the counter several times to release any trapped air bubbles. Place the wrapped springform pan in a large roasting pan, then pour hot water into the roasting pan until it reaches halfway up the sides of the springform pan.</li><li class="MethodStepper"><h4 class="step-title">Step 8</h4>Bake in the water bath for 60-65 minutes. The cheesecake is done when the edges are set but the center still has a slight wobble when gently shaken – it should jiggle like set gelatin, not ripple like liquid. Don't overbake, as the residual heat will continue cooking the center.</li><li class="MethodStepper"><h4 class="step-title">Step 9</h4>Turn off the oven, crack the door open slightly, and let the cheesecake cool gradually in the oven for 1 hour. This slow cooling prevents the dramatic temperature change that can cause cracks.</li><li class="MethodStepper"><h4 class="step-title">Step 10</h4>While the cheesecake is cooling, prepare the topping by mixing the sour cream and sugar in a small bowl. If using food coloring, add a tiny amount for a pale green color that enhances the visual pistachio element.</li><li class="MethodStepper"><h4 class="step-title">Step 11</h4>Remove the cheesecake from the oven and water bath. Gently spread the sour cream mixture over the top, then sprinkle with chopped pistachios, concentrating them more heavily around the edges for visual appeal.</li><li class="MethodStepper"><h4 class="step-title">Step 12</h4>Refrigerate the cheesecake, uncovered, for at least 6 hours or ideally overnight. The flavor develops beautifully with time, making this an excellent make-ahead dessert. When ready to serve, run a thin knife around the edge before releasing the springform.</li><li class="MethodStepper"><h4 class="step-title">Step 13</h4>For the cleanest slices, dip a sharp knife in hot water and wipe dry between cuts. Store any leftovers in the refrigerator for up to 5 days, or freeze slices (wrapped individually) for up to 2 months for an indulgent treat whenever the craving strikes.</li></ol>