Best Substitutes for Tomato Paste
Tomato sauce or ketchup reduced down both concentrate to something close to tomato paste.
Best overall swap
Tomato sauce (reduced)
3 tbsp sauce simmered down per 1 tbsp pasteSimmer uncovered until thickened and reduced by about two-thirds.
All Substitutes for Tomato Paste
Tomato sauce (reduced)
3 tbsp sauce simmered down per 1 tbsp pasteSimmer uncovered until thickened and reduced by about two-thirds.
Ketchup
3 tbsp ketchup per 1 tbsp tomato pasteSweeter and tangier than plain paste, so reduce any added sugar in the recipe.
Sun-dried tomatoes (blended)
Blend 2-3 tbsp rehydrated sun-dried tomatoes per 1 tbsp pasteAdds a more intense, slightly smoky tomato flavor.