- Preheat oven to 350°F (175°C).
- Line a 9×9-inch baking dish with parchment paper.
- In a mixing bowl, combine flour, butter, sugar, and salt until the mixture resembles coarse crumbs.
- Press the dough evenly into the bottom of the pan and bake for 15 minutes, or until lightly golden.
- Let cool while preparing the custard filling.
2. Make the Vanilla Custard
- In a saucepan over medium heat, whisk together milk, heavy cream, and sugar until warm (but not boiling).
- In a separate bowl, whisk egg yolks, cornstarch, and vanilla extract until smooth.
- Slowly pour the warm milk mixture into the egg mixture, whisking constantly to temper the eggs.
- Return the mixture to the saucepan and cook over medium-low heat, stirring continuously until thickened (about 5 minutes).
- Remove from heat and stir in butter until fully incorporated.
3. Assemble & Bake
- Pour the custard over the cooled shortbread crust and spread evenly.
- Bake at 325°F (165°C) for 20 minutes, or until set.
- Let the bars cool completely, then refrigerate for at least 4 hours to allow the custard to firm up.
4. Slice & Serve
- Dust with powdered sugar before slicing into bars.
- Enjoy chilled for the best texture and flavor!
Serving & Storage Tips
- Serving: These bars are best enjoyed cold with a cup of tea or coffee.
- Storage: Keep in the refrigerator for up to 5 days in an airtight container.
- Freezing: Freeze (without powdered sugar) for up to 2 months. Thaw overnight before serving.
Variations & Customizations
- Chocolate Swirl: Drizzle melted chocolate over the custard before baking.
- Lemon Custard Bars: Add 1 tablespoon lemon zest for a citrus twist.
- Nutty Delight: Sprinkle toasted almonds or coconut flakes on top.
- Gluten-Free Option: Use almond flour or a gluten-free flour blend for the crust.
FAQs
1. Why is my custard too soft?
Ensure it is fully cooked and chilled for at least 4 hours before slicing.
2. Can I use vanilla bean instead of extract?
Yes! Scrape one vanilla bean pod into the milk for an extra rich flavor.
3. How do I get clean slices?
Use a sharp knife dipped in warm water, wiping between cuts for perfect edges.
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