Oatmeal Butterscotch Cookies

Ingredients

• 6 tbsp (3/4 stick) unsalted butter, room temperature
• 3/4 cup packed light brown sugar
• 1 large egg
• 2 tsp orange zest (optional)
• 1 tsp vanilla extract
• 1 cup all-purpose flour
• 1 cup rolled oats
• 1/2 tsp baking powder
• 1/4 tsp baking soda
• 1/4 tsp cinnamon
• 1/4 tsp kosher salt
• 1/2 cup butterscotch chips
• Flaky sea salt for topping (optional)