Preheat oven to 325 degrees and line cookie sheets with parchment paper.
In a large bowl, combine cake mixes, eggs and oil and mix well.
Form dough into 2-inch balls and place on cookie sheet. Flatten balls slightly.
Bake for 10-12 minutes until firm.
While cake-cookies are cooling, chop up fruit and make whipped cream.
To assemble, lay one cake-cookie flat side up on a plate and top with about ¼ cup of fruit. Top fruit with a large dollop of whipped cream and drizzle with berry syrup (if using). Top with another cake-cookie, flat-side down. Serve immediately.