Pulverize the freeze-dried strawberries into a fine powder using a blender or food processor.
Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper.
Cream together the room-temperature salted butter and granulated sugar along with the vanilla extract until light and fluffy.
Beat in the egg, then gradually add the all-purpose flour, baking soda, part of the strawberry powder, and kosher salt. Mix in the strawberry jam.
Roll the dough into small balls and place them on the prepared baking sheet. Bake for about 8 minutes, then flatten slightly and bake for another 2-3 minutes until golden but still soft.
Combine cream cheese, powdered sugar, hot milk, vanilla extract, and remaining strawberry powder until smooth and creamy.
Once cookies are cooled, dip them into the icing or drizzle it over the tops.