Salted Butter Break-Ups - Dinner With Julie

Ingredients

• 1 3/4 cup all-purpose flour
• 2/3 cup sugar
• 1/2-1 tsp. sea salt (use less if you're using salted butter)
• 1/2 cup salted or unsalted butter, chilled and cut into pieces
• 4-5 Tbsp. cold water
• 1 egg yolk