If using whole freeze-dried strawberries, use a blender or food processor to process the strawberries into a powder. It should result in a slightly heaping ½ cup of strawberry powder.
In a large bowl, add together the raspberry powder, 3 cups flour, 1½ tsp baking powder, and ½ tsp salt. Whisk together and set aside.
In a large bowl with a hand mixer or stand mixer using the paddle attachment, add the 1 cup unsalted butter and 4oz cream cheese frosting. Beat together until smooth and creamy, roughly 1-2 minutes.
Add 1 cup sugar and beat until mixture is fluffy and combined, about 1 minute.
Add the egg, 1 tsp vanilla extract, and 1 tsp almond extract. Beat on high speed until combined, about 1 minute. Ensure dough is evenly mixed; scrape down the sides and remix as needed.
Add the dry ingredients to the butter mixture and mix on low speed until combined. Dough should be soft and creamy.
Separate dough into two halves. Make two disks by rolling each half into a ball and flattening into a cylindrical disk. Wrap each disk in plastic wrap and refrigerate for 1 hour or freeze for 15 minutes. The ideal texture is stiff to make rolling out the dough easier, but not frozen.
Remove one disk from the fridge or freezer to work with at a time. Flour your hands and a piece of parchment paper. Press the dough between two pieces of parchment paper to prevent sticking and roll to ⅛" - ¼" thickness. (⅛" is better for window pane cookies, ¼" is better for single cookies)
Using heart cookie cutters, or whatever shapes you'd like and cut out cookies. If making window pane chocolate cookies, cut two cookies for each sandwich cookie. On one of each pair, cut a smaller heart out of the center to make the window. Either bake the small cutout as a cookie itself, or combine with other scraps. Lay each cookie on the prepared baking sheet, leaving space between them.
Repeat previous step until dough is used up. Repeat with the second disk of dough.
Bake for 12-13 minutes until just barely beginning to color around the edge. (Note that the smaller cookies will cook faster if you're using the cutout heart centers.) Remove cookies from the oven, and allow to cool for 2-3 minutes before transferring to a wire rack or counter.