Can I use pancake syrup or another maple-flavored syrup instead of pure Canadian maple syrup in these bars?
Technically you can substitute pancake or “maple-flavored” syrup, but the bars will be noticeably sweeter and less complex because those products are mostly corn syrup with artificial flavor. For best texture and the deep, woodsy taste the recipe is built around, stick with pure maple syrup (Grade A amber or dark); if you must swap, reduce the brown sugar slightly and expect a thinner, slightly stickier filling.
Can these Maple Pecan Bars be frozen, and what’s the best way to thaw and serve them?
Yes—once the bars are completely cool, cut them, wrap the pieces individually in plastic wrap, and seal them in an airtight freezer bag or container; they’ll keep well for about 2 months. To serve, thaw the wrapped bars at room temperature for 30–45 minutes (or overnight in the refrigerator), then unwrap and enjoy; a quick 5-minute warm-up in a 300 °F (150 °C) oven will restore just-baked crispness if desired.
How can I adapt this recipe to be gluten-free without losing the shortbread texture?
Use an equal weight of a good 1-to-1 gluten-free all-purpose baking blend (one that already includes xanthan or guar gum, or add ½ tsp xanthan gum yourself) in place of the wheat flour for both the crust and the 1 Tbsp that thickens the filling; the starches in these blends keep the crumb tender yet crisp. For extra insurance, chill the pressed crust for 15 minutes before baking so the cold butter firms up and the shortbread bakes with the same delicate snap.