Step 1

Step 1: Preheat & Prepare the Pan

Step 2

Preheat your oven to 350°F (175°C). Line a 9×13-inch baking pan with parchment paper or grease lightly.

Step 3

Step 2: Cream the Butter & Sugars

Step 4

In a large bowl, beat the butter, brown sugar, and granulated sugar together until light and fluffy.

Step 5

Step 3: Add the Eggs & Vanilla

Step 6

Mix in the eggs and vanilla extract, beating until smooth and fully combined.

Step 7

Step 4: Mix the Dry Ingredients

Step 8

In a separate bowl, whisk together the flour, baking soda, salt, and cinnamon.

Step 9

Step 5: Combine Wet & Dry Ingredients

Step 10

Gradually mix the dry ingredients into the wet mixture until just combined.

Step 11

Step 6: Add Oats & Raisins

Step 12

Fold in the oats and raisins, ensuring they’re evenly distributed.

Step 13

Step 7: Bake the Cookie Bars

Step 14

Spread the dough evenly into the prepared baking pan. Bake for 22-25 minutes, or until the edges turn golden brown.

Step 15

Step 8: Make the Frosting

Step 16

While the bars cool, beat together butter, powdered sugar, vanilla, salt, and heavy cream until smooth and creamy.

Step 17

Step 9: Frost & Slice

Step 18

Once completely cooled, spread the frosting over the bars. Slice into squares and enjoy!