Line an 8x8 or 9x9 square baking pan with parchment paper, with
overlay on the sides. Spray with nonstick spray. Set aside.
Make the Oreo cookie crust by crushing the Oreos into a fine crumb
using a food processor or blender. Mix the crushed Oreo crumbs
and melted butter together in a large bowl. It may look like there is
not enough butter, but it will come together. Place into the
prepared baking pan, pressing the crumbs down into the pan to
create a somewhat even layer.
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In the bowl of a stand mixer or using a handheld mixer, mix the
peanut butter, butter, confectioners' sugar, vanilla, and salt until
the mixture is completely combined and smooth. Spread over the
crumb mixture, smoothing the top with an offset or rubber spatula
(sprayed with nonstick spray, for ease). Chill the bars for at least an
hour, until the filling is set.
Melt the chocolate in medium microwave-safe bowl, stirring every
15 seconds. Or use a double boiler. Pour the chocolate over the
peanut butter filling and evenly spread. Chill the bars in the
refrigerator for at least an hour or until the chocolate topping has
set. Remove bark from the baking pan using the parchment paper
and cut into uneven pieces (or use your hands to break it up).
Store bark in the refrigerator.
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