In a saucepan, combine the Karo syrup, sugar, heavy cream, and the spices.
Heat the syrup mixture, stirring constantly to prevent burning on the bottom. It does not need to boil. When it is fully combined, remove it from the heat and allow to cool.
While the syrup cools, melt the butter in the microwave. Combine the two in the saucepan and mix well. Set aside.
In a large bowl, sift together the flour and baking soda.
Pour the syrup and butter mixture into the flour bowl and mix. You will need to turn it out onto the counter and knead it together with your hands to fully combine the dough.
Place into a clean bowl and cover the bowl with plastic wrap. Place in the refrigerator overnight (or at least 8 hours).
Remove dough from refrigerator and allow the bowl to sit at room temperature for 2-4 hours so the dough can soften.
Preheat oven to 350.
Roll out on a lightly floured surface and cut shapes. Place on parchment paper and bake for 10 minutes. Allow to cool on the tray for several minutes before removing to a wire rack.