4cupssliced rhubarbthinly sliced (or slightly more, 4 large stalks makes about 4 ½ cups)
Instructions
Preheat oven to 350°F. Line 9x13 inch baking pan with parchment paper.
In a bowl, mix together flour, butter, and powdered sugar using a pastry cutter (or food processor). Evenly press crust mixture into bottom of baking pan.
Bake until slightly browned, approximately 15-minutes.
In a bowl, mix together eggs, baking powder, whole wheat flour, granulated sugar, brown sugar, salt, and vanilla using electric mixer for 30-60 seconds (or whisk by hand for 2-3 minutes) until slightly fluffy.
Fold in rhubarb, then pour the mixture evenly over baked crust.
Bake for 35-40 minutes, or until the top is golden brown.
Cool completely. Remove from pan and cut into bars.
Notes
Line the pan with parchment paper to make removal of the bars easier.
Using a pastry cutter or food processor to blend the crust is easiest. If you do not have either, simply use two forks or blend together using your fingers until blended.
Keep leftover rhubarb bars covered in the refrigerator for up to 5 days.
Wrap individual portions in plastic wrap and freeze in zippered bags for up to two months.