Classic Oatmeal Scotchie Bars are soft, chewy oatmeal butterscotch cookie bars topped with sweet cinnamon frosting. You'll love this updated take on an old fashioned favorite!
For the bars, beat butter with sugars until blended. Beat in eggs and vanilla. Add oats, flour, baking soda, salt and cinnamon and beat until combined. Fold in butterscotch morsels.
Press cookie dough in a parchment paper lined 15 inch x 10 inch x 1 inch baking sheet. Bake in a 375 degree oven for 18-22 minutes (I prefer to make these a little on the undercooked side, staying near the 18 minute mark).
Cool completely.
For the frosting, beat butter in an electric mixer with whisk attachment for 3-5 minutes until pale in color. Add cinnamon, salt, powdered sugar and 2Tbsp milk. Beat an additional 3-5 minutes, adding more milk if necessary. Spread over cooled cookie bars. Cut and enjoy.
Notes
Want a thicker frosting? Add less milk. Want a thinner, more pourable frosting? Add more milk!
Store bars in an airtight container at room temperature for up to 5 days. They're so hard to resist that they're likely to get eaten well before then!
I prefer these bars a little on the chewier side, so I take them out of the oven when they're still a little soft. For a crunchier bar, you can leave them in a bit longer.