01 -
Heat the oven to 350°F and line an 8-inch square pan with parchment paper, leaving an overhang on two sides for easy lifting.
02 -
In a large bowl, stir together the oats, flour, baking soda, salt, and cinnamon until evenly combined.
03 -
In a separate bowl, whisk the melted butter, brown sugar, maple syrup, egg, and vanilla until smooth and glossy.
04 -
Pour the wet mixture into the dry ingredients and stir until no dry pockets remain. Fold in the raisins.
05 -
Scrape the batter into the prepared pan and press firmly into an even layer. Bake for 22 to 25 minutes until the top looks set and the edges are light golden.
06 -
Let the pan cool on a wire rack until room temperature. Chill for 20 minutes for cleaner slices, then lift out and cut into 12 bars.