In a large mixing bowl, add the butter and sugar and blend with an electric mixer until fluffy. (you can also use a stand mixer)
Add in the eggs and vanilla extract and blend approximately 15-20 seconds until mixed well.
In a separate medium bowl, add the flour, baking powder and salt and stir together.
Add the flour mixture into the sugar/butter mixture in batches, blending in between each addition until dough forms.
Remove the dough from the bowl and divide it in half
Add about ¼ teaspoon of orange gel food coloring to one of the halves and knead until the color is well incorporated.
Repeat with the other half of the dough, adding about ¼ teaspoon of black gel food coloring and knead until well incorporated.
Place the black dough on a piece of parchment or wax paper and roll it out into an approximately 9x15 rectangle.
Repeat with the orange dough ball, rolling it out on separate piece of parchment paper or wax paper as well.
Keeping the dough on the parchment, place the orange dough directly on top of the black dough and place the baking sheet in the refrigerator for 15-20 minutes to chill.
Remove from the refrigerator and turn the orange dough on top of the black dough lining up the edges as best as possible. (you can also carefully pick up the orange dough and place it on top of the black dough)
Trim along the edges of the dough with a sharp knife or a pizza cutter to make a perfect rectangle.
Starting at the shorter end of the rectangle, roll up the dough a s tight as possible using the parchment paper to help keep it from sticking to fingers.
Wrap the rolled dough in plastic wrap or parchment paper and refrigerate for 2 hours.
Preheat oven to 350° F and line a baking sheet with parchment paper
Place the rolled dough on a cutting board and slice into ¼ inch cookies and place on the cookie sheet.
Bake for 10 minutes
Remove from oven and to cool 2 minutes and then place on a wire cooling rack to cool completely.
Notes
Store in an airtight container for 5-7 days.Roll in sprinkles or coarse sugar prior to cutting. Change the colors if preferred. Use purple and orange, green and orange or any other favorite variations.