Ingredients:

• 1 cup granulated sugar
• 4 tbsp AP flour
• 4 egg yolks
• 1 1/2 cups milk
• 400g butter, unsalted

Directions:

1. Whisk the egg yolks and sugar
2. Add the milk and flour and whisk to combine
3. Add the mixture to a saucepan on low heat and stir until bubbles appear on the surface
4. Remove from heat and whisk in the butter