Active Time
30 Mins
Total Time
2 Hours 25 Mins
Yield
Makes 32 bars (serving size: 1 bar)

These toasty-sweet, sheet pan sandwich cookies are fantastic for potlucks or tailgates—heck, whip a batch up on the weekend and enjoy for after-school snacks or dessert throughout the week. Toffee bits and cinnamon kick up the flavor of a traditional oatmeal cookie, while adding fresh orange zest to the filling adds a special touch or bright flavor to these tasty bars. Be sure the cookie is completely cool (out of the pan) before cutting it, or it will crumble. And to ensure a smooth cut, you’ll want to chill the filled cookie really well before slicing into bars.

How to Make It

Step 1

Prepare the Cookie: Preheat oven to 375°F. Line a 17- x 12-inch rimmed baking sheet with parchment paper. Lightly coat parchment with cooking spray.

Step 2

Beat butter, brown sugar, and granulated sugar with a heavy-duty electric stand mixer on medium speed until light and fluffy, 4 to 5 minutes. Beat in egg and vanilla until smooth and incorporated.

Step 3

Stir together oats, flour, salt, baking soda, and cinnamon in a large bowl until well combined. Add oat mixture to butter mixture. Beat on low speed just until combined. If desired, stir in toffee bits.

Step 4

Press dough evenly into prepared baking sheet. Bake in preheated oven until light golden brown, 23 to 25 minutes. Cool in pan on wire rack 10 minutes. Remove Cookie and parchment from baking sheet, and cool completely on rack, about 20 minutes.

Step 5

Prepare the Filling: Beat butter, vanilla, and salt with a heavy-duty electric stand mixer on medium speed until smooth and incorporated, 1 to 2 minutes. Add powdered sugar and zest; beat on low speed until smooth, 2 to 3 minutes.

Step 6

Place Cookie, upside down, on a cutting board. Remove and discard parchment. Cut Cookie in half crosswise. Spread Filling on half of Cookie. Place unfrosted Cookie half on top, right side up. Cover with plastic wrap, and chill 1 to 2 hours. Cut into 32 bars.

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