These Mulberry Pie Bars are sweet, indulgent, and DELICIOUS! Made with a flaky pie crust, mulberry pie filling, and a crumbly brown sugar oat topping that takes things to another level. These pie bars are the best easy-to-make dessert that everyone will love!
Combine the flour, baking soda, and salt together in a large mixing bowl.
Mix the butter, maple syrup, brown sugar, regular sugar, and vanilla together in a separate bowl.
Pour the liquid ingredients into the dry ingredients and mix until just combined.
Roll the pie crust dough into a ball.
Remove about 1/2 cup of the dough and set aside for the topping.
Press the pie crust dough into an 8x8 baking pan lined with parchment paper.
Bake the pie crust for 15 minutes.
Making The Filling
While the pie crust is baking, mix the mulberries, lemon juice, brown sugar, flour, and cinnamon together, pressing the mulberries down to lightly mash or cut them into halves as you mix.
Once the pie crust is done, remove it from the oven and let it cool for 5 minutes.
Fill the pie crust with the filling.
Making The Topping
Top the pie crust and filling with pieces of the leftover pie crust that was set aside.
Mix rolled oats, maple syrup, and brown sugar together.
Sprinkle the oat crumble topping over the entire baking pan.
Bake the Mulberry Pie Bars for another 30-40 minutes, or until the top begins to turn golden brown.
Let cool for 5-10 minutes, slice into bars, and enjoy!