Rich, fudgy brownies with a decadent Biscoff cookie butter layer and crunchy Biscoff cookie topping.
Ensure the cookie butter layer is completely firm before adding the brownie batter to prevent it from melting into the batter.
Measure flour by spooning it into a measuring cup and leveling it off, or by weight, for best results.
Do not overmix the brownie batter once the flour is added; mix just until combined to keep the brownies fudgy.
Allow the brownies to cool completely before cutting for clean, neat slices.
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