Preheat the oven to 350 degrees Fahrenheit. Lightly grease an 8x8 or 9x9 baking dish.
Add the crust ingredients to a food processor or blender and pulse until mixture is combined. Pour the crust mixture into the baking dish and spread evenly with a spatula.
Bake the crust for about 10-12 minutes, until lightly golden around the edges.
Meanwhile, add the filling ingredients to a medium bowl. Whisk or mix on low with a hand mixer until combined.
Once the crust is baked, take it out of the oven and pour the filling over the crust. Lower the oven temperature to 325 degrees Fahrenheit.
Bake for about 20-25 minutes or until the center is set. The center should not move if you jiggle the pan.
Let cool completely and refrigerate for at least 4 hours before serving. For best results, let cool in the fridge overnight. Optional: sprinkle powdered sugar over the tops of the bars before serving.