Preheat the oven to 200 degrees and place a large cookie sheet on the middle rack.
Warm a crepe pan, stove top griddle or large skillet on medium heat.
Remove pan from heat, butter the pan and add 1/3 cup of batter, immediately and quickly spreading the batter around using a crepe spreader or the back of a spoon so the crepe is as thin as possible.
Place pan back on heat and warm crepe for 2-3 minutes until it just starts to lightly brown.
Flip crepe and cook for an additional 30 seconds to 1 minute.
Place crepe in oven to keep warm and repeat steps 4-7 until all batter is used.
Pull a crepe from the oven, cut in half and spread 1 Tbsp of filling in middle of crepe half, leaving 1 inch around the edges.
Sprinkle 1 tsp of finely chopped walnuts on the filling if desired.
Fold the top of the rounded edges in, holding them in place with the filling.
Starting at one end, roll the crepe to create your carrot shape.
Repeat steps 1-4 with each crepe half, placing them back in the oven to keep them warm.