Prepare the ingredients. Sift the almond flour and powdered sugar together in a bowl to remove any lumps.
Beat the egg whites until stiff peaks form, then gradually add the granulated sugar. The meringue should be firm and the peaks should hold their shape.
Gently fold the almond flour and powdered sugar mixture into the meringue. Be careful not to overmix, to maintain the airy texture.
Transfer the batter to a piping bag fitted with a round tip. Pipe small circles onto a baking sheet lined with parchment paper.
Let the macarons rest for 30 minutes to allow a skin to form on the surface before baking.
Meanwhile, preheat the oven to 300°F (150°C). Bake the macarons for 12-15 minutes, then let them cool completely on the baking sheet.
To make the filling, whisk together the peanut butter and heavy cream in a mixing bowl until light and fluffy.
Melt the milk chocolate, then stir in the caramel sauce and peanut butter mixture until smooth.
Chop the peanuts and fold them into the filling.
Once the filling is evenly combined, refrigerate it for 10-15 minutes to firm up slightly.
Once the macarons have cooled, pipe or spoon the creamy filling onto one half, then top with the other half to create a sandwich.
Refrigerate the assembled macarons for at least 1-2 hours to allow the flavors to meld.
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