Line a 9x13 inch baking dish with parchment paper.

Preheat oven to 350 degrees.

Mix dry crust ingredients together.

If you would like to just use a boxed yellow cake mix, omit the first 4 ingredients and add melted butter and egg to dry mix.

Press into bottom and sides of pan.

For the custard I use a blender but you can also use a mixer.

Mix or blend melted butter, milk and eggs until combined.

Add sugar, flour, salt and vanilla until completely combined.

Scatter berries on uncooked crust and pour custard over the berries and crust.

Bake at 350 degrees for about 50 minutes.

Cool completely and refrigerate for 1 hour before cutting.

Sift powdered sugar on top right before serving.