Mom's Rhubarb Cake

Step 1
Combine 2 cups flour, brown sugar, baking powder, and salt in a bowl. With a pastry blender, cut in the margarine until the mixture resembles coarse crumbs. Stir in the evaporated milk and beaten egg.

Step 2
Press the dough into the bottom and partly up the sides of a 9×13-inch baking dish. For a thicker crust, press the dough into the bottom of the pan only.

Step 3
Preheat an oven to 350 degrees F (175 degrees C).

Step 4
Mix the rhubarb, gelatin mix, and 1/2 cup of white sugar. Spread the fruit over the dough. Combine the remaining 1/2 cup white sugar, 1 cup of flour, and softened butter in a bowl. Cut in the butter until the mixture resembles coarse crumbs. Top the rhubarb with the streusel mixture.

Step 5
Bake in the preheated oven until the topping is golden brown and the filling is bubbly, about 45 minutes.