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1
Preheat the oven to 350F (180C).
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2
Drape a 9 by 13-inch pan with overlapping pieces of aluminum foil, creating handles for easy removal.
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3
Butter the paper, and reserve.
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4
In a food processor, add the flour, oats and brown sugar and pulse to mix.
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5
Add the butter, the cinnamon and the butterscotch chips.
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6
Pulse until the mixture forms clumps when pressed between your fingers.
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7
Transfer the mixture to a large bowl.
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8
Press half of the mixture evenly into the bottom of the prepared pan in a single layer, reserve the other half.
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9
Bake in the preheated oven just until slightly golden and set, about 12 to 16 minutes.
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10
Remove from the oven and cool completely.
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11
Beat together the cream cheese, condensed milk, lemon zest and juice and vanilla in an electric stand mixer fitted with a paddle, or with an electric hand mixer until no lumps of cream cheese remain.
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12
Spread evenly over the baked and cooled oatmeal mixture.
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13
Sprinkle the remaining half of the oatmeal mixture over the cream cheese.
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14
Bake until the top is golden, 38 to 42 minutes.
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15
Cool and refrigerate before cutting.
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16
Use a knife around the edge of the pan, and using the foil handles, transfer the bars to a cutting board.
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17
Cut into 2-inch squares with a sharp knife and serve.