In stand mixer fitted with a paddle attachment, add 1 cup flour, yeast, sugar and salt; mix well. In saucepan or microwave-safe dish, heat milk, water and oil to 120-130°F. Add warm liquids to flour mixture. Blend on low speed for 30 seconds; beat on medium speed for 4 minutes. Add egg; beat 1 minute.
Switch to dough hook attachment. Gradually stir in enough remaining flour to make a firm dough. Knead until smooth and elastic, about 5 to 7 minutes.(NOTE: For hand mixing: following above steps, mix ingredients in large mixing bowl using a wooden spoon or dough whisk. Knead on floured surface until smooth and elastic.) Place dough in lightly oiled bowl and turn to grease top. Cover; let rise until indentation remains after poking dough with finger down to second knuckle, about 1 hour.
Prepare streusel topping: Add brown sugar, flour and cinnamon to small bowl; stir with fork to combine. Add softened butter, stir until fully incorporated; set aside.
Preheat oven to 400°F.
Generously grease two 10-inch pie plates, set aside. Turn dough onto lightly floured surface; punch down to remove air bubbles. Divide dough into 2 pieces. Roll one piece into a 12-inch circle to fit a 10-inch pie plate. Press into the pie plate; flute edges. Repeat with second dough.
Pour your favorite prepared pie filling into shells. Crumble topping over pie filling.
Bake for 15 minutes. Reduce oven temperature to 325°F, and bake additional 20 to 25 minutes. Serve warm or cold.