Preheat the oven to 350F/177C convection (325F/163C conventional) and line a cookie sheet with parchment paper.
Place one cup of the browned butter into a large bowl with the brown sugar.
1 cup (227g) salted European style butter, 1 cup (200g) light brown sugar
Use a whisk to combine the butter and sugar together for 1-2 minutes.
Add the egg and continue whisking until the mixture is smooth and pale, about 2-3 more minutes.
1 large egg
Use a spatula to fold in the flour, baking powder and cinnamon just until the flour is almost combined.
2 1/4 cup (270g) all purpose flour, 2 tsp baking powder, 1/4 tsp cinnamon
Fold in the chopped pecans just until they’re evenly distributed.
1 cup (150g) candied pecan halves
Use a 2 oz cookie scoop to scoop 18 balls of dough into rounds, 6 per pan. Flatten them slightly and bake for about 11-12 minutes, just until the edges begin to brown.
Remove the cookies from the oven, slam the pan onto the counter a couple of times and use a biscuit cutter or large cup to scoot the cookies around to make them perfectly round.
Let the cookies cool completely to room temperature.
Place the rounds of ice cream onto half of the cookies and top with the other half of the cookies.
Serve immediately or place them in an airtight container and return to the freezer.