Apple Pie Streusel

Apple pie streusel is the Pennsylvania Dutch take on the American apple pie classic. Instead of a top crust, the apples bake in a tangy sour cream custard, then get crowned with a buttery cinnamon streusel that crisps in the oven’s final blast. The result is a crossbred dessert: half pie, half custard, all comfort.

The sour cream filling is the move that sets this pie apart. Beating an egg into a cup of sour cream with sugar, flour, vanilla, and salt creates a lush custard base that holds the chopped apples in a creamy suspension. Two tablespoons of flour stabilize the custard so it doesn’t weep, while a quarter teaspoon of lemon zest brightens the flavor.

The two-stage bake matters. A hot 450F (230C) start sets the crust before the filling has a chance to soak through. Reducing to 350F (175C) cooks the apples gently and sets the custard. The streusel goes on at the end to keep it crunchy rather than soggy.

Pro Tips

• Use a tart cooking apple like Granny Smith. Sweet apples turn mushy in the custard.
• Chop the apples evenly so they cook at the same rate.
• Bring the sour cream to room temperature before mixing. Cold sour cream creates lumps in the custard.
• Cool slightly before slicing. Hot custard pies are runny; warm ones slice cleanly.

Variations

• Add a half cup of chopped pecans or walnuts to the streusel for crunch.
• Stir 2 tablespoons of bourbon into the custard for an adult version.
• Use pears instead of apples in the fall when ripe pears are at their peak.