Yes, of course, you can. But you may not end up with candies looking like little turtles. If you use half-pecan, your turtles might look like they’re hiding in their shells. A lot of people also like to make this with crushed pecans, dipping them in chocolate and caramel later. If you go about doing this, you can use turtle moulds. There are other fun moulds available in the market to experiment with for this recipe as well.