Preheat the oven to 350°F. Line a baking sheet with parchment paper
Slice the bread in half and lay side by side on the parchment.
In a bowl whisk together the softened butter, light brown sugar, vanilla, cinnamon and nutmeg until fully combined.
Divide between the bread halves spreading from end to end.
Bake for 25 minutes. The topping will be hot, so carefully cut into 1-inch slices.
Whisk together the powdered sugar, heavy cream and vanilla until the sugar has dissolved.
Drizzle over the cinnamon roll french bread. Serve extra glaze on the side.