1. Preheat oven to 350°F (177°C) and line a baking sheet with parchment paper.

2. In a large bowl, cream together the softened butter, peanut butter, granulated sugar, and brown sugar until light and fluffy.

3. Beat in the egg and vanilla extract until well combined.

4. Add the flour, baking soda, and salt. Mix on low until just combined—do not overmix.

5. Scoop dough into 1.5-inch balls and arrange on the prepared baking sheet, spacing them about 2 inches apart.

6. Bake for 9-11 minutes, until edges are just set but centers are still soft. Remove from oven and let cool completely on a wire rack.

7. Once cookies are cool, generously spread vanilla frosting on top of each, letting it gently spill over the edges to look like melted snow.

8. Decorate each cookie with mini chocolate chips for eyes and a smile, and press an orange candy sprinkle or fondant piece for the nose.

9. Add extra sprinkles or colored candies to create scarves, hats, or earmuffs if desired.

10. Allow frosting to set before serving or storing.