1 cup + 2 Tbl light brown sugar
½ cup + 1Tbl granulated sugar
1 ½ teaspoons ground ginger
1 ½ sticks butter, unsalted,cold, cubed
1 teaspoon salt
½ teaspoon vanilla extract
1 ¾ cups sifted bread flour
Pulse the brown sugar, granulated sugar, cinnamon, butter, salt, and vanilla in a food processor.
Add the flour and pulse to combine. The mixture should be crumbly and should not come together like a dough. You may need to add extra flour.
Store streusel covered in the refrigerator to keep it from drying out.