[3️⃣] Cook Until Thickened
Place over medium heat, stirring constantly and scraping along the bottom and sides of the pan. Cook for 5–7 minutes, or until the mixture thickens to a smooth, pudding-like consistency.
[4️⃣] Finish the Filling
Remove from heat and stir in butter, vanilla extract, and salt until fully incorporated. Pour the warm custard over the cooled crust, spreading evenly.
[5️⃣] Chill to Set
Refrigerate for at least 1 hour—2 to 3 hours is ideal for sharp, clean cuts—until the custard is fully firm.
[6️⃣] Slice & Serve
Lift from the pan using the parchment overhang. Cut into squares and lightly dust with powdered sugar just before serving.
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