Line a 9" x 13" baking pan with parchment paper.
In a bowl, mix maple syrup with nut butter. Microwave for 45 seconds, stirring every 15 seconds, or until melted.
In a large bowl, combine oats, puffed rice, coconut, chopped almonds, dried cranberries and chia seeds (optional).
Pour the maple syrup mixture and vanilla into the dry ingredients and mix well.
Press the mixture evenly into the lined baking pan.
Freeze for 30 minutes, or until the mixture has hardened enough to cut it into 16 pieces.
Wrap each bar in parchment paper and store in the refrigerator or freezer.
12 servings