Preheat the oven to 350°F. Line a baking sheet with parchment paper
Slice the bread in half lengthwise and lay the two halves side by side on the parchment.
In a medium bowl whisk together the softened butter, light brown sugar, vanilla, cinnamon and nutmeg until fully combined.
Divide between the bread halves spreading evenly from end to end.
Bake for 25 minutes until golden brown. Let stand while you make the glaze.
Whisk together the powdered sugar, heavy cream and vanilla until the sugar has dissolved.
Drizzle over the cinnamon roll french bread. The topping will be hot, so carefully cut into 1-inch slices and serve with any extra glaze on the side.
Notes
Bread - The loaves of french bread used in this recipe is one of those inexpensive fluffy loaves from the grocery store bakery. You can use with Italian or French Bread.
Make-Ahead Tip - If you need to make it in advance to save time, you certainly can. I recommend slathering each half with the cinnamon butter then wrap separately with plastic wrap. Chill until you're ready to bake. This can be done up to 1 day in advance.
Extend the Bake Time - When assembling cinnamon roll bread in advance, just before baking, uncover the bread halves and place onto a parchment lined cookie sheet and bake according to the recipe. The butter, brown sugar and spices melt into the bread and flavor it beautifully. When baking from cold, you may need to lengthen the baking time by 5 minutes or so.
Spices - You could replace part of the cinnamon with pumpkin pie spice.
Serving Options - Once baked, mix up the easy vanilla cream glaze and drizzle it on top. Slice and enjoy with a cup of coffee or hot tea for breakfast, brunch, snack or dessert.