Place the pound cake slices on the grill and cook for 2 minutes per side, or until lightly charred and golden brown.
In a small saucepan, combine the honey, cinnamon, butter, and brown sugar. Heat over medium heat, stirring constantly, until the mixture is combined and bubbly.
Remove the grilled pound cake slices from the grill and place on a plate. Drizzle the honey-cinnamon glaze over the slices and serve.