Desserts like this Winter Crisp are ideal for all those holiday potlucks and parties. Just assemble ahead of time, cover, and store in the fridge until you're ready to bake. So easy!
To make the filling, whisk flour, brown sugar, cinnamon, and salt in a large bowl. Add the butter and work into dry mixture with your fingertips until pea-sized lumps form.
Bake until filling is bubbling and streusel golden brown, about 40–45 minutes; let cool for 15 minutes before serving (if serving warm). Serve with ice cream.