Cranberry Crumble Bars

Filling:

If making your own, pulse dried cranberries and granulated sugar in a food processor until a coarse paste forms. Transfer to a saucepan. Whisk cornstarch into cold water, then add to cranberry mixture, whisking to combine. Stir in juice. Simmer over medium-high heat, stirring occasionally, until mixture thickens and sugar dissolves, about 8 minutes. Remove from heat; let cool completely.

Dough:

Preheat oven to 350 degrees. Butter a 9-by-13-inch baking pan, and line with parchment, letting 2 long sides overhang edges. Butter parchment, then flour parchment and sides of pan.

Whisk together flour, baking soda, salt, and cinnamon. Add brown sugar and butter, and stir until well combined. Mix in egg and vanilla, then oats and walnuts.

Press half the dough into pan. Spread the filling evenly over the dough, then crumble remaining dough on top of filling. Bake until golden and cooked through, about 40 minutes. Let cool completely in pan on a wire rack, about 1 hour, then lift out using parchment. Cut into 2-inch squares.