Process the powdered sugar and peanuts until nuts are very finely ground. Take care not to over process the mixture as it will clump and become a paste if the oil from the peanuts get released.
Bring 2 to 3 inches of water to a boil in a medium sized deep pan. Turn down the heat to maintain a very low simmer. In a large bowl or the bowl of a standing mixer, whisk sugar into the egg whites by hand.
Set the bowl over simmering water in pan (bottom of bowl should not touch water) and stir constantly until sugar is dissolved and the mixture feels warm to the touch. Remove the bowl from water and, with an electric mixer on high speed (fitted with the whisk attachment if using standing mixer), whip the egg white mixture until thick, stiff peaks form. Gently fold in powdered sugar-peanut mixture into the egg whites.
Spoon mixture into a pastry bag fitted with a 1/2-inch plain tip and, with the tip almost touching the parchment, pipe into flat 2-inch circles about 1/8 inch thick, 1 inch apart, on two cooking parchment-lined sheets.
Tap the cookie sheets against table to get rid of air bubbles and allow the piped batter to rest at room temperature for about xbd an hour or so, till the tops of the circle do not stick to your finger when touched lightly.
Place the cookie sheet on another empty cookie sheet and bake the macarons at 130C for about 15 to 20 minutes, till tops are dry and edges have formed u201cfeetu201d. Let cookies cool completely on sheets, and then remove by gently lifting them up and peeling the parchment away from the bottoms. Store them in an airtight container if not filling immediately.
Spread the flat side of each of half the cookies with a bit of peanut butter and then some strawberry jam. Top each with a second cookie, flat side toward filling.