diff --git a/src/cache/core/cache.ts b/src/cache/core/cache.ts
index cf9cc79cc00..92dd9eaf5e3 100644
--- a/src/cache/core/cache.ts
+++ b/src/cache/core/cache.ts
@@ -11,31 +11,6 @@ import { Cache } from './types/Cache';
 
 export type Transaction<T> = (c: ApolloCache<T>) => void;
 
-export type BatchOptions<C extends ApolloCache<any>> = {
-  // Same as the first parameter of performTransaction, except the cache
-  // argument will have the subclass type rather than ApolloCache.
-  transaction(cache: C): void;
-
-  // Passing a string for this option creates a new optimistic layer with
-  // that string as its layer.id, just like passing a string for the
-  // optimisticId parameter of performTransaction. Passing true is the
-  // same as passing undefined to performTransaction, and passing false is
-  // the same as passing null.
-  optimistic: string | boolean;
-
-  removeOptimistic?: string;
-
-  // If you want to find out which watched queries were invalidated during
-  // this batch operation, pass this optional callback function. Returning
-  // false from the callback will prevent broadcasting this result.
-  onWatchUpdated?: (
-    this: C,
-    watch: Cache.WatchOptions,
-    newDiff: Cache.DiffResult<any>,
-    oldDiff?: Cache.DiffResult<any>,
-  ) => any;
-};
-
 export abstract class ApolloCache<TSerialized> implements DataProxy {
   // required to implement
   // core API
@@ -84,7 +59,7 @@ export abstract class ApolloCache<TSerialized> implements DataProxy {
   // provide a default batch implementation that's just another way of calling
   // performTransaction. Subclasses of ApolloCache (such as InMemoryCache) can
   // override the batch method to do more interesting things with its options.
-  public batch(options: BatchOptions<this>) {
+  public batch(options: Cache.BatchOptions<this>) {
     const optimisticId =
       typeof options.optimistic === "string" ? options.optimistic :
       options.optimistic === false ? null : void 0;
diff --git a/src/cache/core/types/Cache.ts b/src/cache/core/types/Cache.ts
index 88432f120b1..deddf94421d 100644
--- a/src/cache/core/types/Cache.ts
+++ b/src/cache/core/types/Cache.ts
@@ -1,5 +1,6 @@
 import { DataProxy } from './DataProxy';
 import { Modifier, Modifiers } from './common';
+import { ApolloCache } from '../cache';
 
 export namespace Cache {
   export type WatchCallback = (
@@ -52,6 +53,39 @@ export namespace Cache {
     broadcast?: boolean;
   }
 
+  export interface BatchOptions<C extends ApolloCache<any>> {
+    // Same as the first parameter of performTransaction, except the cache
+    // argument will have the subclass type rather than ApolloCache.
+    transaction(cache: C): void;
+
+    // Passing a string for this option creates a new optimistic layer, with the
+    // given string as its layer.id, just like passing a string for the
+    // optimisticId parameter of performTransaction. Passing true is the same as
+    // passing undefined to performTransaction (runing the batch operation
+    // against the current top layer of the cache), and passing false is the
+    // same as passing null (running the operation against root/non-optimistic
+    // cache data).
+    optimistic: string | boolean;
+
+    // If you specify the ID of an optimistic layer using this option, that
+    // layer will be removed as part of the batch transaction, triggering at
+    // most one broadcast for both the transaction and the removal of the layer.
+    // Note: this option is needed because calling cache.removeOptimistic during
+    // the transaction function may not be not safe, since any modifications to
+    // cache layers may be discarded after the transaction finishes.
+    removeOptimistic?: string;
+
+    // If you want to find out which watched queries were invalidated during
+    // this batch operation, pass this optional callback function. Returning
+    // false from the callback will prevent broadcasting this result.
+    onWatchUpdated?: (
+      this: C,
+      watch: Cache.WatchOptions,
+      diff: Cache.DiffResult<any>,
+      lastDiff: Cache.DiffResult<any> | undefined,
+    ) => any;
+  }
+
   export import DiffResult = DataProxy.DiffResult;
   export import ReadQueryOptions = DataProxy.ReadQueryOptions;
   export import ReadFragmentOptions = DataProxy.ReadFragmentOptions;
diff --git a/src/cache/inmemory/inMemoryCache.ts b/src/cache/inmemory/inMemoryCache.ts
index b5fee375c4b..782ee1b1a23 100644
--- a/src/cache/inmemory/inMemoryCache.ts
+++ b/src/cache/inmemory/inMemoryCache.ts
@@ -5,7 +5,7 @@ import { DocumentNode } from 'graphql';
 import { wrap } from 'optimism';
 import { equal } from '@wry/equality';
 
-import { ApolloCache, BatchOptions } from '../core/cache';
+import { ApolloCache } from '../core/cache';
 import { Cache } from '../core/types/Cache';
 import { MissingFieldError } from '../core/types/common';
 import {
@@ -37,7 +37,7 @@ export interface InMemoryCacheConfig extends ApolloReducerConfig {
 }
 
 type BroadcastOptions = Pick<
-  BatchOptions<InMemoryCache>,
+  Cache.BatchOptions<InMemoryCache>,
   | "optimistic"
   | "onWatchUpdated"
 >
@@ -302,7 +302,7 @@ export class InMemoryCache extends ApolloCache<NormalizedCacheObject> {
 
   private txCount = 0;
 
-  public batch(options: BatchOptions<InMemoryCache>) {
+  public batch(options: Cache.BatchOptions<InMemoryCache>) {
     const {
       transaction,
       optimistic = true,