We extend the modified double-copy construction to quasitopological gravity (QTG) coupled to matter. Spherically symmetric QTG solutions in $D$ dimensions are generated from an auxiliary gauge field in a flat ($D+1$)-dimensional spacetime. The gravitational field equations reduce to two relations determined by the QTG generating function and the matter stress-energy tensor. For a broad class of spherically symmetric matter sources, solutions of the auxiliary gauge-field equations can be used to construct exact solutions of the QTG field equations. The framework applies to Maxwell theory, nonlinear electrodynamics, and Yang-Mills theory, encompasses both static and Vaidya-type solutions, and reproduces the Einstein-gravity limit.

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• Alternative gravity theories
• General relativity
• Gravitation
• Gravity in dimensions other than four