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1
In a medium bowl, stir together oat flour, cornstarch, baking soda and salt. Set aside.
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2
In a large bowl, using an electric hand mixer, beat together mashed avocado, cane sugar and coconut sugar until well combined. Add egg yolks and vanilla extract and beat again until smooth and combined. If you have a few small pieces of avocado, it's totally ok.
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3
Stir in the flour mixture until a sticky dough forms. Make sure to really scrape down the sides and get all the flour mixed in. Cover the bowl and place in the freezer for 45 minutes.
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4
Once chilled, spray 2 cookies sheets with cooking spray and preheat oven to 325u00b0F. Drop the dough by 1-tablespoons balls onto the prepared cookie sheets. The dough is sticky, but try to roll them into balls as much as possible. I find it helps to wash your hands off every few cookies, or keep your hands damp while rolling.
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5
Use your thumb (or any finger) to make a deep hole in the center of the cookie, gently pulling it open to give it a little width. Again, damp hands help. Place the cookie sheets back into the freezer to chill for 15 minutes.
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6
Bake until tops of the cookies just look set, about 13-14 minutes. They will feel very soft, but they cook more as they cool.
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7
While the cookies cook, it's time to make the truffle center. Place avocado into a food processor and blend until smooth.
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8
Place chocolate chips in microwave-safe bowl and microwave in 20-second intervals, on half power, stirring between each interval, until chocolate is smooth and melted. Pour melted chocolate, along with all the remaining ingredients, and process until smooth and well combined.
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9
Once cookies come out of the oven, you'll notice the holes have puffed up and aren't very deep anymore. Working quickly, use your finger (the cookies aren't very hot) to reshape the holes, making sure they're fairly deep.
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10
While the cookies cool on the pan for 5 minutes, fill each hole with 1 teaspoon of the truffle mixture. Once 5 minutes are up, gently transfer to a wire rack to cool completely. Devour.
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11
Note: The truffle filling with firm up a little after a few days. If you want it to soften, just pop the cookie into the microwave for just 2-3 seconds before eating. Also note that cookies soften as they sit.
