Preheat the oven to 350°F (175°C).

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

Beat in the egg and vanilla extract until well combined.

In a separate bowl, whisk together the flour, baking soda, and salt.

Gradually add the dry ingredients to the wet ingredients, mixing until just combined.

Drop rounded tablespoons of dough onto a baking sheet lined with parchment paper, spacing them about 2 inches apart.

Bake in the preheated oven for 8-10 minutes, or until the edges are lightly golden.

Remove from the oven and let cool on the baking sheet for a few minutes before transferring to a wire rack to cool completely.

In a mixing bowl, beat together the softened butter, powdered sugar, maple syrup, and vanilla extract until smooth and creamy.

Once the cookies are completely cool, spread a generous amount of maple cream filling on the flat side of one cookie and top with another cookie to create a sandwich.

Repeat with the remaining cookies and filling.