Try this Maple Pecan Bars recipe, or contribute your own.
Boiling the butter, brown sugar, and maple syrup mixture for exactly one minute drives off excess water content. Insufficient boiling leaves the filling too runny to solidify properly during the second bake. When incorporating heavy cream into the hot sugar base, add it immediately after removing the pan from the heat to prevent splattering and separation. The fats in the cream emulsify with the molten sugar, creating a stable matrix that coats the pecans evenly before they go into the oven.
Assessing doneness relies on observing the bubble pattern across the surface rather than probing with a thermometer. The boiling action transitions from large, erratic bubbles to smaller, tighter pockets of foam as the moisture evaporates and the sugar reaches the correct setting point. Gently shake the pan; a fully baked center shifts as a unified, set mass rather than rippling like liquid. Allow the pan to cool undisturbed for one and a half hours at room temperature. Slicing warm bars shears the internal structure before the sugar crystals fully lock into place, resulting in crumbling edges instead of clean squares.