What do you get when you cross a butter tart with rhubarb? Rhubarb Custard Pie. The ingredients in the custard are very similar to butter tart filling. When combined with rhubarb the end result is a creamy delicious sweet and tart pie.
What do you get when you cross a butter tart with rhubarb? Rhubarb Custard Pie. The ingredients in the custard are very similar to butter tart filling. When combined with rhubarb the end result is a creamy delicious sweet and tart pie.