These gooey maple syrup bars are a little bit like lemon bars, with a shortbread crust and gooey layer. But they feature warm maple syrup and brown sugar instead of bright flavors. Add walnuts or pecans if you would like, they are delicious either way!
Preheat oven to 350℉ and line a 9x13-inch pan with parchment paper.
In a large saucepan, bring the 2 cups pure maple syrup, 1½ cups light brown sugar, and 1 cup pecan or walnut pieces (if using) to a boil over medium to medium high heat.
Reduce heat to medium low and cook for 5 more minutes, stirring occasionally.
Remove from heat and stir in the ¼ teaspoon salt and ½ cup salted butter until melted. Set aside to cool.
In a medium mixing bowl, combined 2 cups all-purpose flour and ½ cup light brown sugar.
Add 1 cup salted butter and mix until crumbly. Press into lined pan.
Bake for 10 minutes then remove from oven and set aside.
In a small bowl, beat together the 4 large eggs and 4 Tablespoons all-purpose flour. Add to maple syrup mixture while stirring. Pour over the crust.
Bake 25-30 more minutes. The top should look mostly set.
Cool completely, then chill before cutting.
Notes
These bars are rich and sweet, so cut into small squares for serving.
They are easier to cut and serve cold, but are delicious at room temperature or even slightly warmed.
Store in an airtight container in the refrigerator for up to 5 days or freeze for longer storage.