Preheat the oven to 350 F. Line a 12 cup muffin pan with paper liners. In a medium bowl, whisk together flour, salt, baking soda, cinnamon and ginger. In a large bowl, mix together butter with sugar and molasses until fluffy.
Add in egg and vanilla extract and mix until smooth. Add in the flour mixture, and mix until it is fully combined. Fold in the white chocolate chips. Evenly divide the mixture between the paper liners. Bake for 12-15 minutes.