Apple Pie Cookies

Ingredients

• 1/4th cup granulated sugar
• 1 tsp. kosher salt
• 2.5 cups all purpose flour (plus more for surface)
• 1 cup (2 sticks) of butter/margarine
• 1 tbsp. chilled apple cider vinegar
• 2 medium Honeycrisp, Braeburn, and/or Golden Delicious apples
• 1/4th cup brown sugar
• 2 tsp. fresh lemon juice
• 1/2 tsp. ground cinnamon
• 1/4th tsp. kosher salt
• 2 tsp. all purpose flour
• 1 large egg
• 1 tbsp. milk (can use nondairy alternative)
• demerara sugar (optional)