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1
Preheat the oven to 350 degrees F. Butter an 8-inch square baking pan.
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2
Add the flour, both sugars, oats and salt to a bowl in your stand mixer.
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3
Add in the butter and egg and beat at low speed.
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4
Stop the machine and scrape the bowl down a couple of times.
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5
Keep processing until the mixture resembles coarse crumbs.
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6
Keep 2 cups crumb mixture aside.
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7
Press the remaining crumb mixture on the bottom the prepared pan.
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8
Spread the Raspberry Preserves over top, leaving 1/2-inch border.
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9
Crumble the rest of the oat mixture over the preserves.
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10
Bake until lightly browned, 40 to 50 minutes.
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11
Cool completely before cutting into bars.
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12
Put your raspberries and 1/4 cup water in a saucepan over medium heat.
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13
Once it's at a simmer, partially cover and cook 8 to 10 minutes.
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14
Pass the berry mixture through a food mill and measure the liquid that remains.
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15
You need 3 1/2 cups.
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16
Add more water if there isn't enough.
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17
Put the berry liquid into a new saucepan over medium heat and bring to a simmer again.
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18
Once it simmers, start adding your sugar in 1/2 cup increments.
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19
Give it a stir to incorporate and bring it back to a simmer before adding of the next 1/2 cup sugar.
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20
Once the last 1/2 cup is added, bring the liquid to 216 to 218 degrees F on a candy thermometer.
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21
Stir constantly.
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22
Let this cool to room temperature prior to using.
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23
If not using right away, refrigerate for up to 1 week.