Yes, you may need to make the crust in two batches. If one box of wafers fills your food processor, make just one box with just 1 stick (½ cup) of melted butter and red food coloring. Once combined, pour the crumbs into a large mixing bowl and repeat with the other box and stick of butter and some more coloring. You can then mix both batches together, add more coloring if needed, and press it into your pan. This will ensure that your crust has an even color and doesn’t look like you have two different layers on the bottom.