Start by preheating your oven to 350°F. Line an 8x8 baking dish with parchment paper – this makes cleanup a breeze and ensures your bars release effortlessly.
Drain your canned peaches and mash them into small, juicy chunks. Then, cook them down with lemon juice and sugar, stirring occasionally, until they become syrupy and irresistible.
Now, the magic begins. Brown two sticks of butter over medium heat until it smells nutty and develops a gorgeous golden hue. Pro tip: keep an eye on it, as brown butter can go from perfect to burnt in seconds!
In a mixing bowl, whisk together your browned butter, brown sugar, spices, and salt. Stir in the flour to create a crumbly dough that doubles as your crust and streusel topping.
Press three-quarters of the dough firmly into your baking dish to form the crust.
Spread the luscious peach filling evenly on top, then crumble the remaining dough over the peaches for that signature streusel look.
Pop the dish in the oven and bake for 45 minutes, or until the top is golden brown and your kitchen smells like heaven. Let the bars cool for at least 30 minutes before slicing – trust me, the wait is worth it!