Preheat the Oven - Preheat your oven to 350°F (175°C). Grease and flour a bundt pan.
Mix Dry Ingredients - In a medium bowl, whisk together the self-rising flour, ginger, cinnamon, and nutmeg until well combined.
Cream the Butter and Sugar - In a large mixing bowl, beat the softened butter and granulated sugar together until light and fluffy, about 3-4 minutes.
Add Eggs and Wet Ingredients - Add the eggs one at a time, mixing well after each addition. Then, mix in the buttermilk, maple syrup, and a few drops of green food coloring until you achieve your desired shade of green.
Combine Wet and Dry Ingredients - Gradually add the dry ingredient mixture to the wet mixture, mixing just until combined. Be careful not to overmix.
Pour into Bundt Pan - Pour the batter into the prepared bundt pan, smoothing the top with a spatula.
Bake - Bake for 45-50 minutes, or until a toothpick inserted into the center comes out clean. Allow the cake to cool in the pan for about 10-15 minutes before inverting it onto a wire rack to cool completely.
Frost the Cake - Once the cake has completely cooled, generously frost the top of the bundt cake with the ready-made Betty Crocker cream cheese frosting.
Decorate - Sprinkle red heart sprinkles on top for a festive touch.
Serve - Slice the cake and enjoy your delightful Grinch Bundt Cake!