Roasted Rhubarb Strawberry Oven Jam

Roasted Rhubarb Strawberry Oven Jam

Every year, in the hot months of summer, my Oma would make oven jam. My Opa would buy her bushels of fresh apricots and plums from the farmers markets, and she would slow roast the fruit until they caramelized and the juices thickened, creating silky fruit jams that she tucked into layers of her torte cakes for celebrations throughout the year. In the years since she died, I find myself craving the custardy texture, and caramelized fruit taste of her jams. I started experimenting with my own oven jams recently, and found them to be simple, fail-safe, and delicious. My favorite is this tangy spring rhubarb strawberry jam, with rhubarb fresh from a friend's garden. If you are craving more of the strawberry and rhubarb combination, check out our Strawberry Rhubarb Shortcakes  or Strawberry Rhubarb Baked Oatmeal

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Yield: slightly more then one 8 ounce (1/2 pint) canning jar


  • 1 pound, strawberries, stems removed, cut in half 
  • 3 cups chopped rhubarb (about 4 medium stalks), tops and bottoms removed, cut into small 1 inch pieces
  • 3/4 cup sugar (can add more or less depending on your preference and the sweetness of your strawberries) 


  1. Heat the oven to 300.
  2. Mix the cut fruit in a medium bowl with the sugar and dump the fruit onto a sheet pan (covered in a silicon baking mat or parchment paper to make for easier clean-up). Distribute the fruit evenly on the baking sheet.
  3. Bake the fruit for 60-90 minutes. You are watching to see the fruit juices boil off, but not cooking the fruit so long that the caramelized fruit juices begin to burn and the fruit dries up completely. This jam is very forgiving, so as long as you take care not to burn the fruit juices in the end, you will be fine.
  4. Once your fruit has finished cooking, remove the pan from the oven and puree the jam until smooth. You can blend more or less depending on the texture of jam you prefer.
  5. Store the jam in the fridge in a covered container for up to 2 weeks. This jam mostly fits, with just a little extra for snacking, in an 8 ounce canning jar.