In a small bowl, stir together the sunflower seed butter and brown rice syrup; the mixture will get thick. Add the 1 ½ teaspoons oil and mix until well combined; the mixture will thin.
Grease an 8x8-inch baking dish.
Place the chocolate chips and remaining 1 teaspoon oil in a microwavable container. Heat the chocolate in the microwave for 1 minute and stir. Continue heating the chocolate in 10 second intervals, whisking between intervals, until just melted and smooth. Do not overheat the chocolate or it can scorch.
Pour the chocolate mixture into your prepared baking dish and even it out.
Using a spoon, place dollops of the sunbutter mixture on top of the chocolate mixture. Using a fork, swirl the tines gently through the candy to swirl the dollops into the chocolate. Sprinkle with sunflower seeds, if desired.
Let cool until set at room temperature, or place the dish in the refrigerator for 20 minutes.
Once it is firm, cut the chocolate into bars.
Store leftovers in an airtight container in the refrigerator for up to 2 months.
Recipe by Go Dairy Free at https://www.godairyfree.org/recipes/sunbutter-swirl-chocolate-fudge-bars