Q: Am I forbidden to eat a partly kosher food item, saying a blessing before eating, with the intention of raising the pure sparks in it?
A: Food is not partly kosher. If the product has unkosher ingredients or was prepared in a way that renders it non-kosher, the entire product is unkosher. If the food is not kosher according to Jewish law, it is not possible to elevate the sparks by making a blessing.