Nutella® Thumbprint Cookies by Katherine Sabbath

Ingredients

• 4/5 cup (200g) unsalted butter, at room temperature
• 1/2 cup (110g) caster (superfine) sugar
• 1 teaspoon vanilla bean paste
• 1 egg, chilled
• 2 1/3 cups (350g) plain (all-purpose) flour
• 1/2 teaspoon sea salt