Grease a 1/4 dry measuring cup and the cups the muffin tray with butter.
Melt the butter in a large pot over medium heat. Add the marshmallows and a large pinch of salt and cook, stirring occasionally, until the marshmallows melt completely, about 5 minutes. Remove from the heat. Add the cereal, almonds, raisins and sunflower seeds and stir with a rubber spatula, making sure to scrape down to the bottom, until the cereal is completely coated. Let the mixture cool for a few minutes and then quickly fold in the candy.
Use the prepared measuring cup to mound the mixture into the cups of the prepared muffin tray. Pat the domes together gently to help the treats hold their shape. Let sit at room temperature until firm, about 30 minutes.
Store at room temperature in an airtight container for up to 3 days.
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