Spray pan with nonstick baking spray and place strips of parchment paper in bottom of pan so the parchment extends over the four pan sides.
Prepare Date Filling
Chop dates into small chunks.
2 Cups Dates, pitted and chopped
Place dates, water and granulated sugar in a medium-size saucepan.
⅓ Cup Granulated Sugar, 1 Cup Water
Bring to a boil, stir often. Reduce to a simmer and cook until mixture is thickened, stirring occasionally (approximately 4 - 6 minutes)
Remove from heat and add the almond flour and vanilla. Stir until absorbed.
½ Cup Almond Flour, 1 teaspoon Pure Vanilla Extract
Set aside to cool completely.
Make Cookie Base
Preheat oven to 350℉ (180℃)
Sift or whisk together flour, baking soda and salt. Set aside for later.
1 ¼ Cup All-Purpose flour, 1 teaspoon Baking Soda, ½ teaspoon Salt
Place softened butter and brown sugar in the bowl of a stand mixer. Using the paddle attachment begin mixing on medium speed. Continue to mix until the butter and sugar mixture is light and fluffy (approximately 2 - 3 minutes). Note: a hand mixer may also be used.
¾ Cup Unsalted Butter, 1 Cup Brown Sugar
Add the flour, baking soda and salt mixture. Mix for 20 - 30 seconds.
Remove bowl from the mixer and stir in the oatmeal. Note: the dough will be crumbly.
1 ¼ Cup Oatmeal, Old Fashioned
Pour half of the dough into the bottom of the prepared pan. Using your hands, lightly press the dough down so it evenly covers the bottom of the pan.
Pour the cooled date mixture over the dough in the pan. Spread it out evenly with a spatula, making sure it reaches all the edges.
Sprinkle the second half of the dough over the dates so it is evenly distributed.
Bake
Bake for 25 - 30 minutes. Cool completely before removing from pan.
Unmold by pulling up on sides of parchment paper and transfer to a cutting board. Remove parchment from bottom of the bar. Cut into desired shapes.
Video
Notes
Storage - Place the bars in an airtight container and leave at room temperature. The bars may also be frozen for up to three months.