Prep: Preheat the oven to 350°F. Spray a 9x13 baking pan with non-stick cooking spray, then set it aside.
Crust: In a large mixing bowl, mix flour, ¾ cup butter and brown sugar until crumbly. Transfer the mixture to pan and press it into the bottom evenly. Bake for 12 minutes.
Filing: Meanwhile, in a separate mixing bowl, whisk the eggs, corn syrup, granulated sugar, 2 TBSP melted butter, almond extract, and cornstarch. Stir in sliced almonds and 1 ⅔ cups chocolate chips.
Spread the mixture evenly over hot crust. Bake for another 25-30 minutes, until center of bars is set. Cool completely.
Topping: Melt remaining chocolate chips in the microwave for 45 seconds. Stir gently, then microwave again for 15-20 seconds. Let sit, then gently stir again.
Transfer the melted chocolate to a plastic baggie, then snip off one small corner of the bag, and drizzle the chocolate in even lines over the bars. Let the treat cool to set. Cut into squares, serve, and enjoy!
Notes
Left over chocolate almond bars should be stored in an airtight container, at room temperature, and they will last up to five days.For longer storage, they can be refrigerated for up to two weeks or frozen for up to three months. Thawing in the refrigerator helps maintain texture when frozen.