Instructions:
- Prepare the Milk Mixture:
- In a medium saucepan, combine the milk with half the sugar (¼ cup).
- If using a vanilla bean, split it and scrape the seeds into the milk. For vanilla extract, add it later.
- Heat the mixture over medium heat, stirring occasionally until the sugar dissolves and the mixture simmers.
- Prepare the Egg Mixture:
- In a separate bowl, whisk the egg yolks with the remaining sugar (¼ cup) and cornstarch until pale and creamy (about 2 minutes).
- Temper the Eggs:
- Gradually pour about one-third of the hot milk mixture into the egg yolk mixture, whisking constantly to prevent curdling.
- Slowly return the tempered egg mixture to the saucepan with the remaining hot milk.
- Cook the Pastry Cream:
- Stir the mixture continuously over medium heat until it thickens and starts to bubble (2-3 minutes).
- Once it begins to boil, cook for an additional 1-2 minutes to fully cook the cornstarch.
- Add Butter and Vanilla:
- Remove the saucepan from heat. Stir in the butter and, if using, vanilla extract.
- Strain and Cool:
- Pour the pastry cream through a fine-mesh sieve into a clean bowl to remove any lumps or cooked egg bits.
- Press plastic wrap directly onto the surface to prevent a skin from forming.
- Let it cool to room temperature, then refrigerate until chilled (about 2 hours).
Tips for Success:
- Use fresh ingredients to enhance the texture and flavor.
- Whisk constantly while cooking to avoid lumps.
- Strain the cream for a smooth and silky texture.
- Cool properly with plastic wrap on the surface to prevent skin formation.
Variations:
- Chocolate Pastry Cream: Stir 4 oz (113 g) of chopped dark chocolate into the hot pastry cream until melted.
- Coffee Pastry Cream: Dissolve 2 tsp of instant coffee granules in the warm milk mixture before adding it to the eggs.