In a large bowl, beat together butter, sugar, egg, and molasses.
In a separate bowl, mix together remaining dry ingredients. Slowly fold in to wet ingredients and mix well continuing to scrape the sides with a rubber spatula. Wrap the large bowl with saran wrap, and place inside the fridge for 2-3 hours.
Preheat oven to 350.
Using an ice scream scoop or large spoon, spoon about 2 tbsp of dough to form cookies and evenly spread across the cookie sheet. About 12 - 15 per sheet.
Place cookie sheet inside the oven, and bake for 15 mins. Cookies will be firm, but soft on the inside. Remove from the oven and let cool on the pan for 10 minutes.
While cookies are cooling, make the glaze. Whisk together melted butter, powdered sugar, milk, and maple extract until smooth. You may need to add in a bit more milk.
Remove the cookies to parchment paper and spoon approximately 2 tsp of glaze on top of each cookie. Cool completely and serve.
Notes
This recipe makes 2 dozen when using approximately 2 tbsp of dough per cookie. You can easily use only 1 tbsp (walnut size) dough balls to make more cookies. Cut the baking time to 6-8 mins.